U.S. patent number 3,782,616 [Application Number 05/226,733] was granted by the patent office on 1974-01-01 for stamp dispensing apparatus.
This patent grant is currently assigned to U.S. Postage Box Company. Invention is credited to John L. Surber, Jr..
United States Patent |
3,782,616 |
Surber, Jr. |
January 1, 1974 |
STAMP DISPENSING APPARATUS
Abstract
An elongated web of stamps having a longitudinally spaced
transverse row of perforations between each stamp is stored as a
roll in the apparatus. The apparatus unwinds the stamp web from the
roll and dispenses the desired number of stamps in response to the
depositing of a preselected amount of money in the apparatus. The
stamp web is engaged on opposite sides by a drive wheel and an
idler wheel, respectively, during the dispensing operation. When
the drive wheel is rotated, it moves the stamp web between two
knife blades and into the opening through which the stamps are
dispensed. Electrical contacts, located on opposite sides of the
stamp web, make contact with each other and actuate a circuit as
each row of perforations passes between the contacts. This circuit
counts the number of stamps being dispensed and stops the drive
wheel when the desired number of stamps are positioned to be cut
from the web by the knives. After each dispensing operation, the
idler wheel moves out of engagement with the stamp web.
Inventors: |
Surber, Jr.; John L. (San
Antonio, TX) |
Assignee: |
U.S. Postage Box Company (San
Antonio, TX)
|
Family
ID: |
22850172 |
Appl.
No.: |
05/226,733 |
Filed: |
February 18, 1972 |
Current U.S.
Class: |
226/43; 226/135;
226/194; 221/144; 226/196.1; 242/615.2; 221/2; 226/177 |
Current CPC
Class: |
G07F
11/68 (20130101) |
Current International
Class: |
G07F
11/68 (20060101); G07F 11/00 (20060101); B65h
025/32 () |
Field of
Search: |
;226/134,135,136,137,141,76,43,194,190,196 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Knowles; Allen N.
Attorney, Agent or Firm: W. F. Hyer et al.
Claims
The invention having been described, what is claimed is:
1. Apparatus for dispensing stamps and the like from an elongated
web of said stamps having a longitudinally spaced transverse row of
perforations between each stamp, comprising a drive wheel to engage
the stamp web and dispense one or more stamps from the apparatus
when the drive wheel is rotated, means for rotating the drive wheel
to dispense the stamps, and means for stopping the rotation of the
drive wheel when a preselected number of stamps have been
dispensed, said stopping means including counting means located
adjacent the moving stamp web and actuated by the passage of each
row of perforations to stop the drive wheel when a preselected
number of said rows have passed, said apparatus being further
provided with a housing having an opening through which the stamps
are dispensed in a substantially horizontal direction, means
supported by the housing for mounting a stamp web roll above the
level of the dispensing drive wheel for the web to be unwound from
the roll and dispensed by the drive wheel, and means for guiding
the web from the roll to the drive wheel including a guide roller
assembly around which the direction of travel of the stamp web is
changed to the substantially horizontal direction it is traveling
when dispensed, said assembly comprising a first idler roller
mounted on the housing for rotation around a fixed axis of rotation
and a second idler roller supported for rotation by the first idler
roller, said second roller comprising a ring encircling the first
roller and having an internal diameter substantially larger than
the outside diameter of the first roller for movement downwardly
with the web as slack is placed into the web between the drive
wheel and the stamp roll after each vending operation and for
movement upwardly into engagement with the first idler roller at
the beginning of a dispensing operation to reduce the possibility
of the web being broken when the drive wheel first begins to rotate
to dispense stamps.
2. Apparatus for dispensing stamps from an elongated web of said
stamps having a transverse row of perforations between each stamp
comprising a housing having an opening through which the stamps are
dispensed, a drive wheel and an idler wheel to engage the stamp web
therebetween and move the web through the opening when the drive
wheel is rotated, means for rotating the drive wheel, means for
actuating the drive wheel rotating means when a coin or coins of a
preselected value are deposited in the housing, means responsive to
the passage of each row of perforations as the web is moved through
the dispensing opening of the housing to stop the drive wheel and
the dispensing of stamps after a preselected number of stamps have
been dispensed, said drive wheel stopping means including circuit
means having first and second contacts positioned on opposite sides
of the stamp web to be electrically insulated from each other by
the imperforate portions of the stamp web and electrically
connected when a row of perforations passes between the contacts,
one of said contacts comprising a brush having bristles of
resilient electrically conductive material that are bent against
one side of the stamp web for one or more of the bristles to extend
through one or more of the perforations as each row passes between
the contacts to make electrical contact with the other contact,
means responsive to a preselected number of electrical connections
between the contacts to stop the drive wheel, means supported by
the housing for mounting a stamp web roll from which the web is
unwound as stamps are dispensed by the drive wheel, means for
guiding the stamp web from the roll to the drive wheel and
including a roller assembly around which the web makes a
substantial change in direction before it reaches the drive wheel,
said roller assembly comprising a first idler roller mounted on the
housing for rotation around a fixed axis of rotation and a second
idler roller supported for rotation by the first idler roller, said
second roller comprising a ring encircling the first roller and
having an internal diameter substantially larger than the outside
diameter of the first roller for movement downwardly with the web
as slack is placed into the web between the drive wheel and the
stamp roll after each vending operation and for movement upwardly
into engagement with the first idler roller at the beginning of a
dispensing operation to reduce the possibility of the web being
broken when the drive wheel first begins to rotate to dispense
stamps.
3. Apparatus for dispensing stamps from an elongated web of said
stamps having a transverse row of perforations between each stamp
comprising a housing having an opening through which the stamps are
dispensed, a drive wheel and an idler wheel to engage the stamp web
therebetween and move the web through the opening when the drive
wheel is rotated, means for rotating the drive wheel, means for
actuating the drive wheel rotating means when a coin or coins of a
preselected value are deposited in the housing, and means
responsive to the passage of each row of perforations as the web is
moved through the dispensing opening of the housing to stop the
drive wheel and the dispensing of stamps after a preselected number
of stamps have been dispensed, said apparatus being further
provided with means mounting the idler wheel for movement between a
dispensing position to engage the stamp web between the idler wheel
and the drive wheel to move the stamp web when the drive wheel is
rotated and a non-dispensing position out of engagement with the
stamp web and means for moving the idler wheel to its dispensing
position when the means for rotating the drive wheel is actuated
and for moving the idler wheel to its non-dispensing position when
the drive wheel rotating means is deactuated.
4. The apparatus of claim 3 further provided with an idler roller,
means mounting the roller to rotate around a fixed axis parallel to
the axis of rotation of the idler wheel and positioned to engage
the idler wheel when the idler wheel is in its dispensing position,
said roller being spaced from the drive wheel a distance such that
the idler wheel will be urged further between the roller and the
drive wheel to increase the force the idler wheel exerts on the
stamp web and the drive wheel and yet be free to move out of
engagement with the drive wheel and return to its non-dispensing
position when the drive wheel stops rotating.
Description
This invention relates to stamp dispensing apparatus, generally,
and in particular to such apparatus that dispense stamps from an
elongated web or tape of stamps having a longitudinally spaced
transverse row of perforations between each stamp.
Where stamps are vended from an elongated web of the stamps, the
stamp or stamps being vended are cut from the web as the final act
of the vending operation. This is usually done by a guillotine type
knife blade that falls through the web to cut off the stamp or
stamps to be vended. Since the position of the knife blade is
fixed, the stamp web must be positioned at the end of each vending
operation for the blade to cut the web between stamps. This means
that once the stamp web is positioned properly, the distance the
web is moved with each vending operation must be substantially
constant with a minimum of variation. Otherwise, the blade will
begin to cut into the stamps rather than in between the stamps,
thus mutilating at least one stamp with each vending operation. It
is also important that any error, occurring in the movement of the
web, not be cummulative, because many stamp vending machines vend
hundreds of stamps between service calls, and even a slight error
in the cut off point, if cummulative, could not be tolerated.
Various ways have been used in the past to insure that the stamp
web is moved the same distance during each vending operation. One
of the simplest ways of moving the web structurally, is to use
rollers or wheels that engage the web on opposite sides and move
the web between them. The problem, however, is controlling the
rotation of the driving wheel so that the web is moved the same
distance each operation.
It is an object of this invention to provide stamp vending
apparatus that employs a drive wheel to engage the stamp web and
move it during the dispensing operation, and that will move the
stamp web substantially the same preselected distance during each
vending operation.
It is another object of this invention to provide such a stamp
vending apparatus wherein any error that may occur in the movement
of the stamp web during one vending operation is not cummulative
and will tend to be corrected in the next vending operation.
It is another object of this invention to provide such a stamp
vending apparatus that counts the number of stamps being vended by
counting the rows of perforations that pass by the counting means
and that stops the rotation of the drive wheel moving the web when
the preselected number of stamps are positioned to be cut from the
stamp web.
It is another object of this invention to provide a stamp vending
apparatus having electrical contacts positioned on opposite sides
of the stamp web that make electrical contact as each row of
perforations pass between the contacts and actuate a counting
circuit that controls the drive wheel and stops its rotation when
the preselected number of stamps have passed the contacts.
It is another object and feature of this invention to provide
apparatus that dispenses a preselected number of stamps from a
stamp web roll and that reduces the load on the web when the web is
initially accelerated from rest to vending speed.
It is another object of this invention to provide stamp dispensing
apparatus that moves the stamp web by passing it between two wheels
and that moves one of the wheels out of engagement with the web
when the apparatus is not in operation. This is a particularly
important feature when the stamps are gummed on one side, which is
usually the case, since it avoids the possibility of the gummed
side of the stamps sticking to one of the wheels with the result
that the stamp web would be torn or damaged when the wheels begin
to turn during the next dispensing operation.
These and other objects, advantages, and features of this invention
will be apparent to those skilled in the art from a consideration
of this specification, including the attached drawings and appended
claims.
The invention will now be described in detail in connection with
the attached drawings in which,
FIG. 1 is a side view, in elevation, of the preferred embodiment of
the stamp dispensing apparatus of this invention, with the outer
case or housing removed;
FIG. 2 is a sectional view taken along line 2--2 of FIG. 1;
FIG. 3 is a sectional view taken along line 3--3 of FIG. 1;
FIG. 4 is a sectional view taken along line 4--4 of FIG. 1;
FIG. 5 is a partial front view of the apparatus of FIG. 1 as
indicated by the arrows 5--5 of FIG. 1;
FIG. 6 is a circuit diagram of the control system for the apparatus
of FIG. 1;
FIG. 7 is a side view on an enlarged scale of the portion of FIG. 2
indicated by arrows 6--6; and
FIGS. 8A and 8B show the stamp web drive wheels of the apparatus in
their dispensing and non-dispensing positions, respectively.
Referring to FIG. 1, mounting plate 10 and its associated mounting
flanges support the various components of the apparatus. Usually,
all of the working parts are enclosed in a suitable case or housing
having an opening through which the stamps are dispensed. The
necessary operating levers, push-buttons and the like, are also
mounted on the housing.
As viewed in FIG. 1, shaft 11 is attached to mounting plate 10 in
the upper right hand quadrant of the plate. Shaft 11 is designed to
support roll 12 of stamps. The web of stamps that forms the roll is
unwound from the roll to feed stamps to the dispensing apparatus.
The stamp web travels from roll 12 through the dispensing apparatus
along the path indicated by dotted line 13. It first passes around
roller 14, where it makes about a 90.degree. turn and then to
roller 15 where it enters vertical guide track 16. This track has
an elongated T-shaped slot (FIG. 2) formed by backplate 16a and two
vertical rails 17a and 17b through which the stamp web passes.
Toward the lower end of the track, rails 17a and 17b terminate, and
backplate 16a curves as shown in FIGS. 1 and 6 to discharge the web
from the track in a substantially horizontal direction. Roller
assembly 20 is positioned to guide the stamp web as it makes this
approximately 90.degree. turn before beginning its horizontal
travel toward the dispensing opening in the housing (not shown) of
the apparatus.
The stamp web is supported next by track assembly 22. As best seen
in FIGS. 3 and 4, this assembly includes U-shaped base 23 that is
attached to bottom flange 24 of the mounting plate. The inside
surface of arms 23a and 23b of the base have parallel horizontal
grooves to receive and support plate 25. The grooves in the arms
and plate 25 form a T-shaped groove or passageway that guides and
supports the stamp web as it moves horizontally along the
track.
Means are provided to move the stamp web the desired distance each
time the apparatus is actuated. In the embodiment shown, drive
wheel 26 is positioned above the stamp web, and above an opening in
plate 25, as shown in FIGS. 1 and 3. Idler wheel assembly 27 is
positioned below the web and drive wheel 26. It includes roller 27a
and movable wheel 27b. Roller 27a is mounted to freely rotate
around the longitudinal axis of shaft 28. The shaft extends between
and is supported by arms 23a and 23b. Movable wheel 27b is mounted
to freely rotate around the longitudinal axis of shaft 29. Arms 23a
and 23b have elongated slots 30 through which shaft 29 extends.
These slots are designed to allow the shaft to be moved and, in
turn, to move the wheel between the dispensing position shown in
FIG. 8A, where the stamp web is engaged between the drive and idler
wheels, and the non-dispensing position shown in FIG. 8B, where the
idler wheel has moved out of engagement with the stamp web. Such
movement is imparted to wheel 27b by the stamp web cutting
apparatus that severs the stamp or stamps being dispensed from the
stamp web.
When the stamp web has been moved the desired distance, the portion
to be dispensed, whether one stamp or several, is severed from the
rest of the stamp web by knife blade 31 moving downwardly through
the stamp web past stationary blade 32. As shown in FIGS. 1 and 5,
movable blade 31 is pivoted at one end to stationary blade 32 by
pin 33. The other end is pivoted to plate 34 by pin 35. Plate 34 is
mounted on front flange 10a of mounting plate 10 by screws 34a and
34b. The screws extend through elongated mounting holes that allow
limited vertical movement of the plate relative to flange 10a. The
plate is moved upwardly by solenoid 36 through link 37 to pivot
movable blade 31 upwardly away from stationary blade 32. Elongated
opening 35a allows pin 35 enough lateral movement relative to plate
34 for such pivotal movement. Solenoid 36, when energized, moves
blade 31 up at the start of the vending operation against spring
38. At the end, it is de-energized and spring 38 moves blade 31
back to the closed position, cutting the stamps to be dispensed
from the stamp web.
As stated above, in the embodiment shown, the movement of idler
wheel 27b into and out of engagement with the stamp web is provided
by the web cutting apparatus. As best seen in FIG. 3, shaft 29 is
supported at each end by members 39a and 39b. Coil springs 40a and
40b are connected between members 39a and 39b and plate 34. When
solenoid 36 is energized at the start of a dispensing operation,
plate 34 is moved upwardly and springs 39a and 39b move idler wheel
27b into engagement with the stamp web below drive wheel 26 and
roller 27a. Preferably, the point of contact between roller 27a and
the idler wheel is located so that clockwise rotation of the drive
wheel will tend to urge the idler wheel further between the drive
wheel and the roller and thereby increase the force the idler wheel
exerts on the stamp web and the drive wheel. The roller should be
positioned, however, so that the idler wheel does not wedge between
the roller and drive wheel so it is not free to return to its
non-dispensing position. Angle A of FIG. 8A, if about 45.degree.,
is satisfactory for this purpose. After the vending operation, the
downward movement of the knife plate will allow the idler wheel to
move to the position shown in FIG. 8B, out of engagement with the
stamp web. By having the gummed side of the web toward the idler
wheel, this removes the possibility of any sticking of the web to
the wheel while the apparatus is inactive.
Preferably, the drive and idler wheels have rims of elastomeric
material so they will grip the stamp web firmly, with a resilient
force. Means are provided to rotate drive wheel 26. In the
embodiment shown, the drive wheel is mounted on output shaft 41a of
electric motor 41. As explained above, the stamp web must be moved
a preselected distance during each operation to dispense the
preselected number of stamps. This means that drive wheel 26 must
rotate through the same angular distance each operation.
In accordance with this invention, means are provided that are
responsive to the passage of each row of perforations as the web is
moved to stop the drive wheel and the dispensing of stamps after a
preselected number of stamps have been dispensed. In the embodiment
shown, said wheel stopping means includes a counting circuit having
a first contact positioned on one side of the stamp web and a
second contact on the other side of the stamp web. The contacts
make contact through the perforations as each row passes and
actuate the counting circuit. The counting circuit includes means
responsive to each electrical connection between the contacts to
stop the rotation of the drive wheel when a preselected number of
such contacts have been made.
In the embodiment shown, the first contact includes plate 25 as
shown in FIG. 4 of track assembly 22. The second contact comprises
brush 42 having a plurality of resilient, electrically conductive,
bristles 42a that are bent against the top side of the stamp web
above plate 25 as shown in FIG. 4. Being bent against the stamp web
and plate 25, bristles 42a will be held out of electrical contact
with plate 25 except when one or more of said bristles pass through
one or more of the perforations in a row of perforations, as the
row passes between the bristles and plate 25. Thus, as each row of
perforations passes between the two contacts, an electrical
connection will be made and then broken as the row of perforations
passes beyond the bristles of brush 40. This arrangement will cause
a series of electrical pulses to be produced, which can be used to
count the number of stamps passing below or between the two
contacts and can stop drive wheel 26 when a preselected number of
said perforations have been counted.
As shown in FIG. 2, the brush is positioned, preferably, with the
bristles extending across the web at an angle to its direction of
travel to increase the length of time each row of perforations is
under the bristles. Generally L-shaped brush mounting plate 47
supports the brush above the stamp web. The brush is attached to
arm 47a of the plate that extends across the stamp web and track
22. Arm 47b of the plate is attached to mounting plate 10 by bolts
47c that extend through an elongated opening or slot in mounting
plate 10. This arrangement allows the position of the brush
relative to the cut off knife blades to be adjusted to accommodate
stamps having different distances between perforations. The force
with which the bristles of the brush push down on the stamp web is
controlled by arm 60 that is pivotally connected to the bottom of
the brush by hinge 61 (FIG. 1). End 60a of the arm engages the
bristles and the other end 60b engages adjusting screw 62 that is
supported by bracket 63 attached to mounting plate 10 (FIG. 4). By
changing the position of adjusting screw 62, the amount of bend in
the bristles can be adjusted which adjusts the force exerted on the
stamp web by the bristles. Another advantage of this arrangement
appears when threading a stamp web under the bristles when a new
stamp roll is being placed in the machine. By pressing down on end
60b, the bristles can be bent upwardly away from track 22 far
enough to allow a stamp web to be positioned on the track without
interference from the brush.
The electrical circuitry of the apparatus is shown in FIG. 6. As
shown, the apparatus is designed to be operated by the deposit of
one or more coins of a predetermined monetary amount. For example,
the apparatus may be arranged to dispense one 8 cent stamp for the
deposit of ten cents. Stepper switch 43 is stepped once for each
pulse coming from coin operated pulser 43. It can be adjusted as
desired to require the desired coins before it provides the
apparatus with power. For example, as shown, switch 43 must be
stepped five times by coin operated pulser 53 to move contact 43a
into position to connect pushbutton switch 44 with a source of
power. This could be the result of the deposit of 25 cents to buy
three eight cent stamps.
The stamp purchaser, after having deposited the required number of
coins, will then push an actuating lever, such as pushbutton 44, to
obtain his stamps. This supplies power to relay 45, which closes
switch 46 supplying power to motor 41 and solenoid 36. The solenoid
moves blade 31 upwardly, and idler wheel 27b into engagement with
the drive wheel, as motor 41 rotates the drive wheel. As each row
of perforations passes between plate 25 and the bristles of brush
42, power is supplied to stepper switch 48. Stepper switch 48 is
preset to complete the circuit to relay 49, when a preselected
number of rows of perforations have passed between contacts 25 and
42. Assume, for example, that the apparatus is vending three 8 cent
stamps per operation, as explained above then, stepper switch 48
would be arranged to energize relay 49 when it has received three
pulses from contact 42. When relay 49 is energized, it will open
switch 50, stopping motor 41 and de-energizing solenoid 36. This
allows movable knife blade 31 to cut three stamps off the stamp
web.
Switch 52 is the "last stamp switch." It is located at any
convenient place to be held closed by the stamp web. As the end of
the web passes the switch it will open. This will not stop the
dispensing operation in process, because of loop 45a that locks
this relay closed independently of power through switch 52, but it
will prevent any other purchases from being made.
When motor 41 is first energized, drive wheel 26 and idler wheel
27b are brought up to speed very quickly to move the desired number
of stamps past the cut off knives. This means that the stamp web
itself is accelerated rapidly from a position of rest to the
peripheral speed of the drive wheel. If the stamp web was taut
between the drive wheel and the roll of stamps on shaft 11, it is
possible that the inertia of roll 12 would be enough to cause the
stamp web to break due to the rapid acceleration and initial
tensile load imposed on the stamp web by drive wheel 26. Usually,
however, because of its inertia, roll 12 will continue rotating
briefly after the movement of the stamp web between the drive wheel
and the idler wheel is stopped. This will provide some slack
between the roll of stamps and the drive wheel, which will tend to
lessen the chance of pulling the stamp web apart at the start of a
vending operation.
It is another feature of this invention to provide means to take
advantage of this slack and to act as a shock absorber between the
drive wheel and the roll of stamps being dispensed. In FIG. 7,
roller assembly 20 is shown on an enlarged scale, along with the
lower end of track 16 and the right hand end of track 22. Backplate
16a of track 16 curves approximately 90.degree. to direct stamp web
13, shown dotted, toward horizontal track 22. Deflector plate 22a
extends from the forward end of track 22 to below the end of plate
16a to guide the stamp web toward track 22, when the stamp web is
being threaded initially into position for vending.
Roller assembly 20 includes roller 54 that is mounted to rotate
around the longitudinal axis of shaft 56. Encircling roller 54 is a
second roller 58 having an internal diameter substantially larger
than the outside diameter of roller 54. During a vending operation,
the tension in the stamp web will pull roller 58 into engagement
with roller 54 to guide the stamp web as it makes a substantially
90.degree. turn and leaves roller 58 in line with the opening in
track 22. After the vending operation as stated above, stamp roll
12 will usually continue rotating putting some slack in the stamp
web between the roll and the drive wheel. This slack allows roller
58 of roller assembly 20 to move downwardly to the position shown
in FIG. 6, and out of contact with roller 54. Then, when the next
stamp or stamps are dispensed the initial acceleration of the stamp
web will first move roller 58 upwardly into engagement with roller
54 and in doing so, due to the weight of roller 58, allow the stamp
web to be brought up to or near its final speed as roller 58 is
moving into engagement with roller 54. This tends to reduce the
tendency of the web to break.
From the foregoing, it will be seen that this invention is one well
adapted to attain all of the ends and objects hereinabove set
forth, together with other advantages which are obvious and which
are inherent to the apparatus.
It will be understood that certain features and subcombinations are
of utility and may be employed without reference to other features
and subcombinations. This is contemplated by and is within the
scope of the claims.
As many possible embodiments may be made of the apparatus of this
invention without departing from the scope thereof, it is to be
understood that all matter herein set forth or shown in the
accompanying drawings is to be interpreted as illustrative and not
in a limiting sense.
* * * * *