U.S. patent number 3,576,163 [Application Number 04/806,099] was granted by the patent office on 1971-04-27 for automatic document handling ejection apparatus.
This patent grant is currently assigned to Pitney-Bowes, Inc.. Invention is credited to James G. Lawson.
United States Patent |
3,576,163 |
Lawson |
April 27, 1971 |
AUTOMATIC DOCUMENT HANDLING EJECTION APPARATUS
Abstract
A postage printing device having a letter eject mechanism
operated in timed relation to the machine printing cycle. A pair of
feed pressure rolls are spring driven into operative engagement
with the imprinted letter so that a set of power driven rolls
cooperating therewith can eject the letter from the print station.
During the terminal portion of the machine cycle said pressure
rolls are restored to and latched in their normal positions spaced
from said driven rolls.
Inventors: |
Lawson; James G. (Norwalk,
CT) |
Assignee: |
Pitney-Bowes, Inc. (Stamford,
CT)
|
Family
ID: |
25193314 |
Appl.
No.: |
04/806,099 |
Filed: |
March 11, 1969 |
Current U.S.
Class: |
101/233;
271/274 |
Current CPC
Class: |
B41L
21/02 (20130101) |
Current International
Class: |
B41L
21/00 (20060101); B41L 21/02 (20060101); B65h
029/20 () |
Field of
Search: |
;101/232,233,234,235,236,287,407 (B)/ ;101/407 (P)/
;271/2,51,52,53,80 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pulfrey; Robert E.
Assistant Examiner: Fisher; J. Reed
Claims
I claim:
1. In a document handling a printing machine, an ejection pressure
roller assembly adapted to cooperate with ejection drive means to
eject the document quickly and accurately from the printing station
comprising:
a frame defining guideways;
a slide member slidably engaged with said guideways for sliding
movement along said guideways;
a plurality of pressure rollers;
suspension mounting means for mounting said pressure rollers on
said slide member;
said slide member being movable along said guideways from an
initial position to an ejection position, in said initial position
said pressure rollers being spaced from said ejection drive means
for receiving a document to be printed in said printing station
with the document located between said ejection drive means and
said pressure rollers and in said ejection position said pressure
rollers being near said ejection drive means for pressing the
document against said ejection drive means to eject the document
from said printing station;
a quick-action linkage for moving said slide member from its
initial position to its ejection position, said linkage
including
a spring lever;
a main pivot pivotally mounting said spring lever on said
frame;
said spring lever having a main arm initially extending generally
at right angles to said slide ways;
a connecting link extending between said spring lever and said
slide member and being pivotally connected to said main arm and to
said slide member;
a first spring engaging said spring lever applying force to said
spring lever in a direction to urge said slide member to move from
said initial to said ejection position; said main arm of said
spring lever and said connecting link approaching parallelism with
said guideways when said slide member is in its ejection position
for multiplying the force of said first spring by toggle
action;
detent means associated with said linkage;
latch means engageable with said detent means for retaining said
slide member in its initial position against the force of said
first spring;
latch spring means urging said latch means into engagement with
said detent means; and
release means for disengaging said latch means from said detent
means.
2. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 1 in which said
suspension mounting means for said pressure rollers is a suspension
arm extending in a direction generally perpendicular to said
guideways; a pivot connecting the central portion of said
suspension arm to the end of said slide member nearest said
ejection drive means; one of said pressure rollers being mounted on
each end of said suspension arm; and said slide member and
suspension arm being arranged to allow limited swinging movement of
said suspension arm about said pivot for equalizing the pressure of
said pressure rollers against the document being ejected.
3. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 2 in which the one of
said pressure roller which is in the trailing position with respect
to the direction of ejection of a document is tapered for aiding in
steering the document along the desired ejection path.
4. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 1 in which said detent
means is a notch in said slide member and said latch means is a
latch lever pivotally mounted upon said frame having a nose portion
adapted to engage in said notch, said latch spring means urging the
nose portion of said latch lever toward engagement with said
notch.
5. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 4, in which said
release means includes a release arm pivotally mounted upon said
frame for arcuate movement; a deflectable spring arm secured to
said release arm, said deflectable spring arm being stiff in the
plane of arcuate movement of said release arm and normally
extending into operative relationship with said latch lever; a trip
element engageable with said release arm for swinging said release
arm to bring said spring arm into engagement with said latch lever
to release said latch lever; and said spring arm being deflectable
out of said plane for rendering said deflectable spring arm
inoperative.
6. In a postage meter and printing machine, an ejection pressure
roller assembly and ejection drive means to eject the document
quickly and accurately from the printing station comprising:
a document supporting deck for receiving the letter to be printed
and having a plurality of access openings therein;
ejection drive means positioned beneath said deck, said ejection
drive means including a plurality of ejection rollers projecting up
into said access openings;
a frame defining guideways extending toward said deck; a slide
member slidably engaged with said guideways for sliding movement
along said guideways;
a plurality of pressure rollers;
suspension mounting means for mounting said pressure rollers on
said slide member in opposed relationship with said ejection
rollers;
said slide member being movable along said guideways from an
initial position to an ejection position, in said initial position
said pressure rollers being spaced above said deck away from said
ejection rollers and in said ejection position said pressure
rollers being down adjacent to said ejection rollers for pressing
the letter against said ejection rollers to eject the letter from
said deck;
a quick-action linkage for moving said slide member from its
initial position to its ejection position, said linkage
including
a spring lever;
a main pivot pivotally mounting said spring lever on said
frame;
a connecting link extending between and being pivotally connected
to said spring lever and said slide member;
a first spring engaging said spring lever applying force to said
spring lever in a direction to urge said slide member to move from
said initial to said ejection position;
detent means associated with said linkage;
latch means engageable with said detent means for retaining said
slide member in its initial position against the force of said
first spring;
latch spring means urging said latch means into engagement with
said detent means;
release means for disengaging said latch means from said detent
means;
a recocking plunger included in said ejection drive means, said
plunger normally being retracted below said deck in alignment with
one of said access openings; and
plunger drive means for raising said plunger into engagement with
said slide member for returning said slide member to its initial
position.
7. In a postage meter printing machine an ejection pressure roller
assembly and ejection drive means as claimed in claim 6, in which
said plunger drive means includes a cam driven by said ejection
drive means; and a lever system operated by said cam for raising
said plunger after said ejection rollers have been rotated by said
ejection drive means, thereby raising said slide member back to its
initial position at the conclusion of the ejection cycle.
8. In a document handling and printing machine, an ejection
pressure roller assembly comprising:
a frame member defining guideways;
a slide member slidable along said guideways between an initial
position and an ejection position;
a plurality of pressure rollers;
suspension mounting means for mounting said pressure rollers on
said slide member;
a main lever;
a main pivot pivotally mounting said main lever on said frame;
a connecting link extending between said main lever and said slide
member and being pivotally connected to said main lever and slide
member;
a main spring connected between said frame and said main lever for
urging said slide member to move toward said ejection position;
a pivoted latch lever for latching said slide member in its initial
position, said latch lever having an actuating arm;
a latch lever spring urging said latch toward latching engagement
with said slide member;
said frame including a rearwardly extending portion;
a release lever pivotally mounted on said rearwardly extending
frame portion;
said release lever having a first arm extending adjacent to said
actuating arm;
spring means urging said first arm away from said actuating arm;
and
a trip element for overcoming said spring means to bring said first
arm into engagement with said actuating arm for unlatching said
latch lever.
9. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 8, in which said slide
member has an abutment surface thereon, a plunger engageable with
said abutment surface, and plunger drive means for moving said
plunger into engagement with said abutment surface to return the
slide member to its initial position at the conclusion of the
ejection of a document from the machine.
10. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 8, in which a second
arm is mounted on said release lever, said second arm having a
sloping camming surface thereon.
11. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 10, in which said
release lever includes means for adjusting the angle between said
first and second arms.
12. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 10, in which said
first arm is a flat spring which is stiff in the plane of movement
of said release lever, said first arm being deflectable out of said
plane for placing said first arm in inoperative relationship with
respect to said actuating arm.
13. In a document handling and printing machine, an ejection
pressure roller assembly as claimed in claim 10, in which there is
a trip element movable along a line engaging the sloping surface on
said release lever to move said release lever to bring said first
arm into engagement with said actuating arm for unlatching said
latch lever.
14. In a postage meter and printing machine, apparatus for
automatically handling the letter to be printed with respect to a
printing station within the machine and for automatically ejecting
the letter along a path from the machine, said apparatus
comprising:
a supporting deck for receiving the letter thereon to be printed at
a printing station;
ejection means for ejecting the letter from said printing
station;
a frame defining guideways directed toward said ejection means;
a slide member movable along said guideways;
a plurality of pressure rollers mounted on mounting means;
a pivot connection pivotally connecting said mounting means to said
slide member;
said slide member being movable along said guideways from an
initial position to an ejection position, in said initial position
of said slide member said pressure rollers being spaced from said
ejection means for receiving a letter to be printed on said
supporting deck between said ejection means and said pressure
rollers, and in said ejection position of said slide member said
pressure rollers being displaced toward said ejection means for
pressing against the letter to be ejected;
said pivot connection between said mounting means and said slide
member permitting said mounting means to pivot relative to said
slide member so that said pressure rollers can press simultaneously
against the letter to be ejected;
a main spring urging said slide member to move from its initial to
its ejection position;
latch means engageable with said slide member for holding said
slide member in its initial position; and
release means for releasing said latch means from said slide
member.
15. In a postage meter and printing machine, apparatus for
automatically handling the letter to be printed as claimed in claim
14,
including a stripper member movably mounted above said supporting
deck and spaced therefrom;
a letter fence stop pivotally mounted upon said stripper
member;
first spring means normally urging said letter fence stop down into
location near said deck to be struck by the leading end of a letter
inserted upon said deck to position the letter to be printed at the
printing station;
a prop lever having a pivot mounting below said deck, the axis of
said pivot mounting extending transversely with respect to the path
of ejection of the letter from the machine;
second spring means urging said prop lever to swing upwardly above
said deck;
said stripper member being movable upwardly and raising said letter
fence stop into an elevated position temporarily away from said
deck, thereby allowing said prop lever to swing upwardly above said
deck to engage said letter fence stop in its elevated position to
temporarily hold it in said elevated position.
16. In a postage meter and printing machine, apparatus for
automatically handling the letter to be printed as claimed in claim
15, in which said second spring means exerts only a light force on
said prop lever and in which said prop lever when holding said
letter fence stop in said elevated position is in the path of
ejection of the letter, said light force being such that the
leading end of the letter as it is being ejected can depress said
prop lever, thereby releasing said letter fence stop to return
toward said deck after the leading end of the letter has passed
thereby.
17. In a postage meter and printing machine, apparatus for
automatically handling the letter to be printed as claimed in claim
16, in which said letter fence stop has a projecting ledge normally
resting upon said prop lever when said letter fence stop is in its
normal position near said deck in position to be struck by the
leading end of a letter being inserted into the machine.
Description
This invention related to automatic document handling ejection
apparatus for business printing machines and the like. More
particularly the invention relates to novel reliable mechanism for
receiving documents, one at a time, to be registered at a work
station in a document handling machine and for quickly and
accurately ejecting each document after the desired operation has
been performed on the document, such as printing, punching or a
similar operation.
In many business document processing applications it is desired to
register or arrest a document at a work station and, for after the
desired operation has been performed, to quickly and accurately
eject the document from the work station to a downstream location
with the apparatus being recycled in readiness for the next
document. A number of problems arise in such applications,
including those of positively arresting each document in the same
location so that the printed impression or other work operation
will be accurately performed and of reliably handling the business
documents, such as envelopes of many different lengths and
thickness and weight, and of quickly and accurately ejecting the
documents in a short cycle time without requiring adjustments to
compensate for variations in size and weight of the documents being
handled. Further important problems are in the achievement of
reliability for operation on a consistent, repeatable basis day in
and day out and in the provision for avoiding inadvertent operation
or triggering of the fast ejection apparatus.
Accordingly, it is an object of the present invention to provide
novel automatic document handling and fast ejection apparatus which
meets these requirements in an improved compact structure.
Another object is to provide such apparatus having a novel
mechanism which is simple and reliable and is capable of repeated
operation over more than a hundred thousand cycles.
A further object is to provide automatic document handling and
ejection apparatus which is fast in operation so as to minimize the
time for a document to be ejected and which provides for accurate
guidance of the document in spite of its rapid ejection.
Further objects and advantages will become apparent as the
description proceeds.
A preferred embodiment of the present invention is shown in the
accompanying drawings wherein:
FIG. 1 is a side elevational view (shown enlarged about 40 percent)
of automatic document handling fast action ejection apparatus
according to the invention and shown in its initial latched
position in readiness for receiving a document inserted therein;
FIG. 1 includes a showing of the ejector rollers and drive
gearing;
FIG. 2 is a side elevational view of the apparatus of FIG. 1 drawn
on the same scale as FIG. 1 and showing the pressure roller
assembly in its unlatched or triggered position at the commencement
of the document ejection cycle;
FIG. 3 is a side elevational view corresponding to a portion of
FIG. 2, illustrating the cooperation of the pressure and ejector
rollers with the stop release mechanism to eject the document;
FIG. 4 is a side elevational view of the ejector rollers and gear
train drive arrangement and shown on reduced scale from FIG. 1;
FIG. 5 is a top plan view of the apparatus of FIG. 4 and also
showing the lift system for raising the pressure roller assembly
back up to its initial latched position at the conclusion of an
ejector cycle;
FIG. 6 is a top plan view of the pressure roller assembly and
document support deck, shown on further enlarged scale from FIG.
1;
FIG. 7 is a top plan view of the document support deck and stop
release mechanism, as seen in FIG. 6 with the pressure roller
assembly removed;
FIG. 8 is an end elevational view of the apparatus of FIG. 6;
and
FIG. 9 is an exploded perspective view of the components of the
pressure roller assembly with the components drawn approximately in
their actual size.
Referring initially to FIGS. 1, 2 and 3, the automatic document
handling fast action ejection apparatus includes a document
supporting deck 9 onto which the documents are fed in one-by-one
succession. In this preferred embodiment, as shown, the particular
documents being handled are letters L, and the work operation being
performed is the printing of a postage stamp impression of a
respective selected value in the upper right-hand corner of each
letter supplied onto the deck 9. The letter L may be supplied
manually onto the deck 9, or in the case of a large volume of mail,
they may be supplied automatically one by one from a supply feeding
unit shown in U.S. Pat. No. 3,072,052 dated Jan. 8, 1963.
When each letter is received on the deck 9 it is positioned between
ejection drive means located below the letter and generally
indicated at 10 and a fast-action pressure roller assembly 11
located above the letter. The ejection drive means 10 is located
within a base portion of the machine, and this ejection drive means
includes a pair of ejector rollers 12 and 14 which are accessible
through deck openings 16 to the lower surface of the letter L.
These ejector rollers 12 and 14 are driven by a drive train when
the letter is being ejected, as will be explained in detail further
below. In the pressure roller assembly 11 there are a pair of
pressure rollers 22 and 24 which are movable and are positioned in
opposed relationship to the ejector rollers 12 and 14,
respectively.
In FIG. 1 the pressure rollers 22 and 24 are shown in their raised
position, and the fast acting linkage within the assembly 11 is in
its initial, raised, latched positioned, as will be explained in
detail further below. In FIGS. 2 and 3 the pressure rollers 22 and
24 are shown pressing down upon a letter L to press it against the
ejector rollers 12 and 14 for the purpose of quickly and accurately
ejecting the stamped letter toward the right as illustrated in FIG.
3. The pressure rollers 22 and 24 are carried by suspension 25 in
the form of a suspension arm pivotally connected at 26 near its
center to a slide member 20. The slide member 20 (See also FIG. 9)
includes a slide element 27 which can slide up and down between
slide ways 28 that are provided by a pair of parallel guide
elements 29 and 30 (FIG. 9) defined by the frame of the pressure
roller assembly 11. This frame includes a backplate 31 integral
with the guide elements 29 and 30 and also includes a front plate
32 which is bent at right angles (FIG. 9) so as to form a
rearwardly extending frame portion 33.
To retain the slide element 27 between the ways 28, an edge of the
front frame plate 32 overlaps an edge of the slide element 27 with
sufficient clearance to permit free sliding movement. Similarly,
the edge of another front plate 34 (FIG. 9) overlaps the other edge
of the slide element 27. The slide member 20 as a whole includes a
mounting element 36 which is rigidly secured to the slide element
27 by a pair of rivets 38 and 39.
In order to provide sufficient clearance for the edges of the two
front plates 32 and 34 to fit freely between the slide elements 27
and 36, the two rivets 38 and 39 each include spacing shoulders
sandwiched between the slide elements 27 and 36. The pivot 26 is
secured to the mounting element 36 and projects forwardly into the
bore of a boss 40 on an upstanding flange 42 of the suspension arm
25, and a retainer 43 holds the suspension arm on the pivot 26.
The suspension arm 25 is allowed to make a limited swinging
movement about the pivot 26 for the purpose of substantially
equalizing the pressure exerted as shown in FIG. 2, by each of the
pressure rollers 22 and 24 against the upper surface of the letter
L being ejected. To permit this limited swinging movement, the
upstanding flange 42 (FIG. 9) has an elongated opening 44 through
which freely extends the projecting end of the lower slide rivet
39.
A quick-action linkage is provided in the pressure roller assembly
11 for moving the pressure rollers from their initial elevated
position, as seen in FIG. 1, to their ejection position down onto
the letter surface, as seen in FIG. 2. This quick-action linkage
includes a connecting link 46 whose lower end pivotally engages the
projecting end of the lower slide rivet 36 and is held by a
retainer 47.
The upper end of the connecting link 46 is attached by a pivot pin
48 to the main arm 50 of a spring lever 51. This spring lever is
pivotally mounted on the frame 32 by a main pivot 52. A main
tension spring 54 is connected between an L-shaped arm 56 of the
lever 51 and a spring mounting lug 58 formed by an extension of the
guide element 29.
As will be understood from FIGS. 1 and 2, the tension force of the
main spring 54 pulling on the L-shaped arm 56 of the lever 51
applies a torque in a counterclockwise direction around the main
pivot 52. Thus, the main arm 50 pushes down on the link 46 which
transmits this downthrust to the pivot 39 of the slide 20, tending
to push the slide down toward the deck 9.
In order to latch the slide 20 in its raised initial position, the
slide is provided with detent means in the form of a notch 60 (FIG.
9) in the edge of the slide element 27. Latch means engages in the
detent notch 60. This latch means is in the form of a pivoted latch
lever 62 (FIG. 9) having a tapered nose 64 adapted to engage in the
detent notch 60. The central portion of this lever 62 is mounted
upon a pivot pin 66 (FIG. 9) secured to the backplate 31, and the
latch 62 is positioned so that it is sandwiched between the
backplate 31 and the front plate 32. There is sufficient clearance
between the back and front plates 31 and 32, and the guide element
30 is partially cut away near the pivot 66 so as to allow the latch
lever 62 to be swing back and forth a limited distance about its
pivot 66 for the purpose of retracting the nose 64 from the notch
60.
An actuating arm or latch slide 68 extends toward the right from
the latch lever 62, and a manual actuation pin 70 extends forward
through an arcuate slot 72 in the front plate 32. The end of the
actuating arm 68 also extends out through an opening 73 near the
end of the slot 72. A spring 74 (FIG. 9) is mounted on a stud 76
held by a retainer 77, and one end of this spring projects forward
beneath the arm 68 to urge this arm upwardly, thus applying torque
to the latch lever 62 in a counterclockwise direction about its
pivot 66. In this way the nose 64 of the latch is urged to enter
the notch 60 to latch the slide 20 in its initial raised
position.
It is to be noted from FIG. 1 that when the slide 20 is latched in
its raised position the main arm 50 extends beyond the slideways 28
almost perpendicular to these slideways so as to be almost
perpendicular to the line of travel of the slide 20. At the same
time the link 46 extends at a substantial angle to the line of
travel of the slide 20. Consequently, when the latch 62 is
released, in a manner to be explained further below, the main arm
50 is in the most advantageous position for providing a high rate
of downward acceleration to the pressure rollers 22 and 24. Thus, a
fast downward stroke is achieved.
As seen from FIG. 2, when the pressure rollers 22 and 24 near the
lower limit of their stroke, the link 46 reaches a position in
which it extends vertically, and the main arm 50 is approaching a
vertical orientation, thereby providing a toggle action which
multiplies the force of the spring 54 in applying force to the
pressure rollers 22 and 24. Thus, it will be understood that the
pressure rollers assembly 11 provides a fast ejection action and
also provides substantial pressure on the rollers 22 and 24 at the
conclusion of their downstroke so as to assure fast and accurate
ejection of the printed letter L.
It is noted as seen most clearly in FIG. 6, that the pressure
roller 22, which is in a trailing position with respect to the
direction of ejection of the letters L, is tapered. The direction
of taper is such that the larger diameter of this roller 22 is
adjacent to the suspension arm 25, i.e. is located toward the upper
edge of the letter. The purpose of this taper is to steer the
ejected letters so as to assure that they travel along a straight
line in spite of the fact that the main bulk of the letter is
positioned off to one side of the ejector rolls 12 and 14. In FIG.
6 the direction of ejection is toward the right as indicated by the
arrow 80, this arrow being aligned with the track line of the
ejector rollers 12 and 14. The main bulk of the letter lies to the
right of the track line 80; that is, the main bulk is located in
the direction 81. The inertial of this offset mass would normally
tend to turn the letter off of the track line as indicated by the
dotted arrow 82 in the direction of the main bulk of the letter,
but the tapered roller 22 overcomes this tendency so as to provide
a reliably straight path of travel.
In relation to the document handling and ejection apparatus the
sequence of steps of operation and related functions are described
hereinafter to provide further understanding of the present
invention.
In operation the letter L is inserted, as shown in FIG. 2, until
its leading end strikes the vertical surface of a removable letter
stop or letter fence 84 which is pivotally mounted on a stud 86. A
spring 85 (FIG. 8) normally urges the letter stop in a
counterclockwise direction about its pivot 86 so that its
projecting end 87 normally rests down on the deck 9. To assure that
the leading end of the letter L positively strikes the letter fence
84 without becoming snagged or wedging beneath it and to restrain
the letter in position prior to the printing operation there is an
upwardly sloping deflector cam 88 serving as a letter holder drag
member which extends upwardly slightly above the lever of the deck
9. This letter holder drag member 88 is mounted upon a
longitudinally extending pivot shaft 89 (most clearly seen in FIGS.
2, 7 and 8), and a spring 91 urges the member 88 upwardly so that
it presses up against the letter L, as seen in FIG. 2. In this way
the letter is restrained and the registration of the leading end of
the letter L is positively assured.
A sensing probe, not shown, senses the presence of the letter L and
triggers a document meter. In this preferred embodiment the
document meter serves to account for the postage stamp impression
about to be imprinted upon the letter. After the meter has been
actuated, then the stamp printing impression is applied to the
letter L in its registered position in the upper right-hand corner.
This printing mechanism and the meter mentioned above are not part
of this invention and therefore have been omitted to illustrate the
present invention more clearly.
The manner in which the printing impression is applied to the
letter L is as follows. There is a movable platen (not shown) which
is normally positioned with its upper surface in the same plane as
the deck 9. The platen is located in the cutout region of the deck
9, as generally indicated in FIG. 7 by the reference letter P. At
the time when the printing impression is to be made, the platen
pushes the letter up against the printing dies (not shown) which
are located overhead in a protected region. When the platen raises,
a member 92, (FIG. 8) called a stripper plate member, also moves
upwardly. The pivot 86 for the letter fence stop 84 is mounted on
the stripper member 92. Thus, when the stripper member moves up, it
raises the letter fence stop 84 away from the deck generally into
the elevated position shown at 84', 87' in FIG. 8.
There is a fence elevator lever or prop 93 (FIGS. 1, 2, 3 and 8)
mounted on a pivot 97 which is located beneath the deck 9 and has
its axis extending transversely with respect to the direction of
ejection 80. A spring 99 urges this elevator lever 93 to swing
toward its elevated position about its pivot 97. Normally, the
letter fence stop 84 depresses this elevator lever 93 to the
inclined position as seen in FIGS. 1 and 2. The letter stop 84
includes a horizontally projecting ledge 83 which rests down upon
the elevator lever 93 so as to depress the lever 93.
When the stripper plate member moves upwardly, as described further
above, it raises the letter fence stop 84 to the raised position as
shown in FIG. 3, thus allowing the elevator lever 93 to quickly
swing up from its initial position 93' (FIG. 3) to its raised
position 93 (FIG. 3). In this raised position the lever 93 serves
to prop up the fence stop 84. Accordingly, when the stripper member
92 moves downwardly again, the elevator lever 93 holds the fence
stop 84 in its elevated position. The spring 99 which is associated
with the elevator lever 93 is a light spring. Therefore, as shown
in FIG. 3 when the letter is ejected, the leading end of the letter
easily pushes the lever 93 back down to its initial position 93'.
This depression of the lever 93 allows the fence stop 84 to swing
back down toward the deck 9, but the letter has already begun
passing below the stop 84 so that the stop does not interfere with
the ejection of the letter. The ejection operation will be further
described below.
At the conclusion of the printing operation as indicated in FIG. 8
by the movement arrow, an arm 90 swings down and moves the stripper
member 92 downwardly thus pulling a trigger rod 94 downwardly. This
rod 94 is mounted to slide with respect to a pair of stationary
guides 95. A trip bushing element 96 is mounted upon the upper end
of this rod 94 is pulled down from its initial position 96' to its
trip position as shown at 96. This trip bushing 96 engages the
sloping nose surface 98 (FIG. 8) of a release arm 100 of a release
lever which is pivotally mounted at 102 upon a rivet stud secured
to the rearwardly extending frame portion 33. The trip bushing 96
thus cams the nose surface 98 to the left from the position 98',
causing the release lever to swing in a counterclockwise direction
about its pivot stud 102. A spring 103 mounted on the pivot 102 has
one end engaged with the release arm 100 by a nut and lockwasher
assembly 104 on a stud 105 (FIG. 9). This spring 103 urges the
release arm in a clockwise direction about the pivot 102 (FIG. 8).
The clockwise movement of the release arm 100 is limited by a stop
shoulder 101 (FIG. 9) which engages a tab stop 107 which projects
from the frame portion 33.
Attached to this release arm 100 and forming another arm of the
release lever is a flat spring arm 106 which extends toward the
left in FIG. 8. The spring arm 106 extends generally at right
angles to the release arm 100. The angular relationship between the
spring arm 106 and the release arm 100 can be adjusted by loosening
the nut and lockwasher assembly 104 on the stud 105. In this way
the tripping action of the release arm with respect to the latch
lever 62 can be adjusted.
The counterclockwise movement of the release arm 100 about the
pivot stud 102 causes the spring arm 106 to swing downwardly from
its initial position 106'. This spring arm 106 is stiff in the
vertical plane, that is, in the plane of its arcuate movement about
the pivot 102, but it is deflectable in a direction parallel with
the axis of the pivot 102. Normally, the end of the spring arm 106
extends forwardly above the end of the actuating arm 68 of the
latch lever 62.
As the spring arm 106 swings downwardly it strikes the actuating
arm 68 causing the latch lever 62 to swing in a clockwise direction
about its pivot 66, thus retracting its nose 64 from the detent
notch 60. Unlatching of the slide 20 allows the main spring 54 and
spring lever 51 to rapidly drive the pressure rollers 22 and 24
down onto the letter L, as shown in FIG. 2.
The mechanism in the base of the machine which actuates the arm 90
(FIG. 8) also serves to energize an ejection drive motor (not
shown) which is connected to a shaft 108 (FIGS. 4 and 5) of a gear
109 in the drive train of the ejection drive means 10. The gear 109
drives a gear 110 which is secured to a larger gear 111 that
engages gears 112 and 114 so as to drive the two ejector rollers 12
and 14 a high speed. Thus, these rollers are commencing to turn at
high speed at the instant when the pressure rollers 22 and 24 come
down upon the letter to feed it out of the machine. The leading end
of the letter depresses the elevator lever 93, as discussed above
and as illustrated in FIG. 3.
As shown in FIGS. 4 and 5 there are additional ejection feed
rollers 116 and 118 for moving the printed letter quickly off
toward the right in FIGS. 4 and 5. The drive gear 109 also engages
a gear 119 secured to a larger gear 120 which drives a smaller gear
121 connected to the feed roller 116, thus turning this roller 116
at a high speed. An idler roller 122 mounted on a pivoted arm 123
rests upon the letter opposite the feed roller 116. The drive train
for the final feed roller 118 includes the roller shaft 124 which
is connected to a gear 125 engaging an idler gear 126 which drives
a gear 127 secured to the shaft 128 for the roller 118. An idler
roller 129 mounted on a pivoted arm 130 rests upon the letter
opposite the roller 118. After a very brief moment the letter is
ejected along the desired path from the machine.
In order to return, i.e. to recock the pressure roller assembly 11
to its initial position, there is a recocking plunger 132 (FIGS. 4,
5 and 7) which can move upwardly through an access opening 134 in
the deck 9. This plunger 132 is operated by plunger drive means
including a cam 136 and lever system 138 causing the plunger 132 to
move upwardly at the end of the cycle of operation.
The plunger 132 presses upwardly against a horizontal abutment
surface 140 provided at the lower end of the slide assembly 20.
When the slide assembly 20 is raised by the plunger 132 back up to
the upper limit of its stroke as shown in full lines in FIG. 8, the
nose 64 of the latch lever 62 engages in the detent notch 60 to
hold the slide in its elevated position in readiness to repeat the
cycle.
Since many changes could be made in the embodiment of the invention
as particularly described and shown herein without departing from
the scope of the invention, it is intended that this embodiment be
considered as exemplary and that the invention not be limited
except as arranged by the following claims:
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