U.S. patent number 3,660,964 [Application Number 04/844,348] was granted by the patent office on 1972-05-09 for material guide members for a compressing and conveying apparatus.
This patent grant is currently assigned to MSL Industries, Inc.. Invention is credited to Arnold L. Willis, Harold Wortman.
United States Patent |
3,660,964 |
Willis , et al. |
May 9, 1972 |
MATERIAL GUIDE MEMBERS FOR A COMPRESSING AND CONVEYING
APPARATUS
Abstract
An apparatus having parallel, spaced apart belt conveyors and a
hopper used in conjunction therewith and provided with a pair of
flexible spaced apart material guide members positioned inwardly of
and adjacent to the lateral edges of the belt conveyors to prevent
material being conveyed by the conveyors from becoming entangled
therewith.
Inventors: |
Willis; Arnold L. (Chicago,
IL), Wortman; Harold (Morton Grove, IL) |
Assignee: |
MSL Industries, Inc.
(N/A)
|
Family
ID: |
25292471 |
Appl.
No.: |
04/844,348 |
Filed: |
July 24, 1969 |
Current U.S.
Class: |
53/524 |
Current CPC
Class: |
B68G
7/06 (20130101) |
Current International
Class: |
B68G
7/06 (20060101); B68G 7/00 (20060101); B65b
001/24 (); B65b 063/02 (); B65b 027/12 () |
Field of
Search: |
;53/24,124E,124CC,125 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
711,544 |
|
Jul 1954 |
|
GB |
|
978,686 |
|
Dec 1964 |
|
GB |
|
Primary Examiner: Morse, Jr.; Wayne A.
Claims
What is claimed is:
1. Apparatus for placing a bat of compressible, resilient, fibrous
material into an open ended pillow tick in a substantially
non-compressed form comprising a hopper for the receipt of a soft,
resilient, compressible, fibrous bat of synthetic fiber material of
predetermined size and shape, a pair of spaced apart, substantially
parallel belt conveyors, means for driving at least one of said
conveyors, said conveyors having discharge ends shaped for the
positioning of said pillow tick thereover for the receipt of a
conveyed bat, said hopper being positioned adjacent one end of the
spaced conveyors, a belt conveyor located adjacent the hopper
bottom and coplanar with one of said spaced apart parallel belt
conveyors for the feeding of said batt into said spaced apart
conveyors, drive means for said belt conveyors, an adjustable pair
of opposed, flexible, material guide members coplanar with the
sidewalls of the hopper and extending between the conveyor belts
and within the lateral width thereof, said guide means extending
from the hopper to an area beyond the drive means for the parallel
belt conveyors to prevent material being compressed by the parallel
belt conveyors from becoming entangled with said drive means, said
belt conveyors and guide means forming a passageway for the
vertical and horizontal compression of said bat during the
conveyance thereof, said spaced apart conveyors having discharge
ends shaped for the positioning of said pillow tick thereover for
the direct feeding of the bat into the pillow tick, thereby
providing for the substantial release of said compression applied
to said bat as it is fed into said pillow tick.
Description
This invention relates to a machine for temporarily compressing and
conveying a resilient bat of fibrous material for placement in an
envelope, or fabric tubing, and, particularly, concerns a material
guide arrangement positioned between the belt conveyors for
maintaining and constricting the material within the lateral width
of the conveyor belts.
Heretofore, it has been a common practice when manufacturing
pillows of various types and furniture cushions to place a
resilient bat of fibrous material in the pillow ticking, or a
fabric envelope, by conveying it through a chute-like arrangement
of continuously driven belts. These belts temporarily compress the
bat of resilient material in order to efficiently introduce it into
the opened end of pillow ticking, or a fabric envelope, which is
supported adjacent the outlet end of the belt conveyor. As this bat
of resilient material is compressed between the belts, it expands
outwardly toward the lateral edges of the belts. Occasionally,
strands of the fibrous material have become tangled and wound
around the various shafts, pulleys, and other related
belt-supporting and driving mechanisms as the bat of material
expands due to the compression. This has presented no appreciable
problem in the past, since such pillows and cushions have been
produced utilizing short stranded material.
Recently, the use of continuous filament material, or tow, has been
utilized as pillow filler, or cushioning material, and unless
provisions are made to confine the lateral expansion of this
material within the belt conveyor mechanism, strands of this
material may wind around bearing shafts, support shafts, or the
like, which may cause buildup on the belt pulleys and thereby
increase the tension on the conveyor belt. Because the synthetic
filaments normally used are quite strong and do not readily break,
such continuous strands of material will continue to wind around
such drive mechanism and may clog the bearings, or cause damage to
the driving shafts, which will require machine down time to clear
this unwanted debris. Also, because of the nature of the bat and
cohesiveness of the fibers, the catching of even a single filament
quickly results in the dragging of additional filaments into the
drive means with the accompanying destruction of the bat and
shutdown of the machine.
In accordance with the present invention, there is provided a pair
of material guide members which constrict and retain the lateral
expansion of the bats of continuous filament tow as it is conveyed
and compressed between a pair of opposed belt conveyors from an
inlet and to an output end and thereby substantially eliminate the
possibility of strands of the continuous filament material winding
around the belt-supporting and driving shafts, and related
mechanism.
Other features and advantages of this invention will become
apparent by reference to the accompanying drawings and the
following descriptions of certain preferred embodiments thereof,
wherein:
FIG. 1 is a side elevational view of the machine embodying the
invention with parts broken away;
FIG. 2 is a top plan view of the machine shown in FIG. 1;
FIG. 3 is a transverse sectional view of the belt conveyor assembly
taken on lines 3--3 of FIG. 1 and shows the material guide
members;
FIG. 4 is an enlarged fragmentary transverse sectional view of the
conveyor assembly shown in FIG. 3 with the conveyor guide members
illustrated in a second position;
FIG. 5 is an enlarged fragmentary, longitudinal sectional view of
the conveyor assembly taken generally on line 5--5 of FIG. 2 and
showing the conveyor assembly introducing a bat of material into an
envelope and thereby stripping the assembled product from the
conveyor assembly; and
FIG. 6 is an enlarged transverse sectional view of the conveyor
assembly taken on line 6--6 of FIG. 2 with certain parts
removed.
In practicing this invention, continuous filament tow made up of
synthetic yarn material may be fed from a supply source in a
crimped, deregistered, bulked mass of continuous filament strands
which cascade into a collection area. The machine operator rolls
this material into a low-density bat until a predetermined amount,
determined generally by weight, is accumulated. At this time, the
resilient bat of material is severed from the supply source by any
suitable means, for example, a heated wire which is passed through
the rope-like mass of tow. The bat is then placed in a hopper which
is supported by the machine frame and comes to rest upon a
continuously moving endless belt conveyor positioned at the hopper
bottom. This bat is then transported to an inlet end of a belt
conveyor assembly comprising a pair of spaced apart, endless belts.
The belt conveyor assembly forms generally a continuously moving
chute arrangement which temporarily reduces the vertical height of
the bat by compressing the resilient bat of continuous filament tow
introduced therein by the first-mentioned conveyor, with a
substantial lack of permanent compression, and combines the bat
between the inward opposed faces of the belt surfaces and a pair of
spaced apart material constricting guide members positioned
adjacent the lateral edges of the belt. These guide members
restrain any outward expansion of the compressed bat and thereby
retain all fibers within the lateral width of the belt. These
driven belts convey the bat to the opposite end thereof under
compression, where it is ejected from the conveyor assembly and
inserted into the open end of an envelope or fabric tubing which is
supported at the outlet end of the conveyor assembly. The envelope,
or fabric tubing, is loosely positioned over the outlet end of the
conveyor assembly and encircles the conveyors. Due to the direction
of movement of the outwardly facing reaches of the belt, the
envelope is maintained in position and as the bat is ejected from
the belts, it is immediately inserted into the envelope and by this
operation, the assembled product is stripped off from the conveyor
outlet end. When the bat is completely released from the belt
assembly, it re-expands within the envelope to provide a
low-density, resilient cushion, or pillow.
Referring particularly to the drawings, and particularly FIGS. 1
and 2, it will be noted that there is a frame 10 which comprises a
rectangular base 12 and four upstanding leg members 14, all of
which are constructed of conventional channel members, or the like.
At the upper end of legs 14, there is provided a flat, bilevel
support platform 16 which is secured to the upper ends of the legs
14 and supports the material conveyor assemblies discussed
hereinafter. The support platform 16 comprises a lower section 16a
and an upper section 16b, which are joined intermediate the ends
thereof by a vertical section 16c.
A driving motor 18 is supported on the rectangular base 12 and is
connected to any suitable source of electrical power 20. The output
shaft 22 of the motor 18 has secured thereto a driving sprocket 24.
The driving sprocket 24 drives a conventional roller chain 26 about
an idler sprocket 28, and driven sprockets 30 and 32, which power
the conveyor assemblies, as will be discussed hereinafter.
Supported on the lower portion 16a of the support platform 16 is a
belt conveyor assembly 34, which comprises a pair of side frames
36, and a conveyor belt 37. At the opposite ends of the side frames
36, there are driven shafts 38 and 40 which extend between the side
frames and are journaled at their opposite ends in fixed bearing
supports 42 and adjustable bearing supports 44. Supports 44 are
movable by a conventional screw and nut arrangement 46 which is
utilized to take up any slack in the belt 37 and to place the
desired tension in the belt to insure its driving relationship with
the belt pulleys, or rollers 48 secured to the respective shafts 40
and 38. The internal surface of the belt 37 frictionally engages
the outer periphery of the pulleys, or rollers 48 and thereby
transmits the power received from the motor 18 through suitable
drive means discussed hereinafter.
Located on the upper level or portion 16b of the support platform
16 is a conveyor assembly 50, which comprises an upper belt
conveyor 52 and a lower belt conveyor 54 (see FIG. 3). The frame
structure 56 for the horizontally spaced apart belt conveyors 52
and 54 includes side frame members 58 and vertically spaced apart
flat plates 60 and 62, all suitably welded together to provide a
suitable supporting framework for the belt conveyors 52 and 54.
Welded at the outer ends of the spaced apart flat plate members 60
and 62 are a pair of transverse rods 64, one welded to each end of
the outer ends of the plates 60 and 62 to serve as a frictionless
surface for the inside of belts 52 and 54 at the outlet end of the
belt conveyors.
Intermediate the ends of the belt conveyors, the side frames 58
support a series of fixed bearing support members 66 and adjustable
bearing support members 68. These bearing support members have
journaled therein transverse conveyor shafts 70 and 72 and each of
the shafts 70 have secured thereon a pulley or roller member 74,
while shafts 72, which are driven, as will be explained
hereinafter, have a larger pulley 75 secured thereto. The pulleys
74 and 75 frictionally engage the inner surface of the belts 52 and
54 to provide a frictional driving relationship therebetween and
the adjustable bearing supports 68 are provided with a conventional
screw and nut adjustment arrangement 76 to remove any slack from
the belt and to provide the appropriate tension to insure the
frictional engagement and driving relationship previously
discussed.
The driven shafts 72 are directly connected to the previously
discussed drive chain 26 by means of sprockets 30 and 32 secured in
a coplanar relationship at one end of the respective shafts 72. The
driving chain 26 is engaged with the driving sprocket 24 and
contacts on one side thereof sprocket 30 and wraps around on the
opposite side of the chain sprocket 32 in order to provide a
counter-rotating relationship between the sprockets to insure
unidirectional movement of the inner surfaces of the belts 52 and
54. The idler sprocket 28 is supported by depending frame member 78
which is secured by any suitable means to the frame structure 10
and is movable to tension the driving chain 26.
It will be noted in FIG. 2 that at the opposite end of the upper
driven shaft 72, there is connected a sprocket 80 which is secured
to the shaft and connected by means of a chain 82 to a sprocket 84,
which is secured in a coplanar relationship on the end of shaft 38
in order to transmit power to the belt conveyor 34 to cause the
belt 37 to move in corresponding direction to belt 54.
A hoodlike guard 90 is positioned over the upper conveyor assembly
52 and its drive components to protect the operator from contact
with the bulk 52, shafts 70 and 72, and roller or pulley 74 and 75
and related chain drives 26 and 82.
Positioned above the conveyor belt 37 is a material-receiving
hopper 92, which includes a pair of side plates 94 and 96, a rear
end wall 98, and a front end wall 100. The front end wall 100 is
positioned above and adjacent the pulley 75 and extends from the
upper edge of the hopper to the adjacent periphery of pulley 75.
The hopper is provided with an open top and bottom, thus exposing
the upper surface of the continuously moving belt 37.
In accordance with the present invention, it is important to
prevent material received from the hopper from becoming entangled
with the drive mechanisms, which could occur if the material is not
retained inwardly of the outer edges of the belt conveyor. To this
end, a pair of upstanding material guide members 102 and 104 are
provided, which extend from the sidewalls 94 and 96 of the hopper
92 outwardly along the lateral edges of the belts 52 and 54. These
guide members, or material constricting guides 102 and 104 are
positioned between the inner faces, or the opposed faces of belts
52 and 54 and within the lateral width of the belts adjacent the
edges thereof. The guide members extend substantially along the
length of the belt along the input end to a point intermediate the
opposite end or the outlet end of the belt conveyors. It will be
noted in FIG. 1 that they extend beyond the area where the drive
shafts 72, idler shaft 70 and their associated pulleys 74 and 75
and associated bearing structures 66 and 68 are located.
In the preferred embodiment, these guide members are continuations
of the side plates 94 and 96 of the hopper 92. However, it is
within the scope of the invention that the side plates be
additional members, either connected to the hopper 92, or
independently supported by other suitable means from the frame
structure of the conveyor assembly 50.
The guide members 102 and 104 are flexible and are adjustable
inwardly toward the center of the belt conveyor assembly and away
from the edges thereof by a screw and nut arrangement 106 supported
from the platform 62 by support member 108, as will be seen in FIG.
6.
The continuous filament tow bat is shown in FIGS. 1, 2, 4, and 5
and is indicated by the letter B. The envelope to which the
temporarily compressed bat is inserted is shown in FIG. 5 and
indicated by the letter T. In the particular embodiment, the
envelope is a pillow ticking and the bat shown is pillow
filler.
It should be noted that the spaced apart frame members 60 and 62 of
the conveyor assembly 50 are provided with rounded side edges to
facilitate the receiving of the envelope T therearound, which
loosely encircles the conveyor assembly during the operation of the
machine. These rounded edge portions of the frame members 60 and 62
are shown in FIGS. 3 and 4 of the drawings.
The operation of the machine is as follows:
The motor 18 is energized through the suitable power source 20,
which causes chain 26 to be driven in a clockwise direction by
rotation of shaft 22 and sprocket 24 secured thereto. The chain 26
in turn drives sprocket 32 on upper shaft 72 in a clockwise
direction and drives the sprocket 30 on lower shaft 72 in a
counterclockwise direction, which causes the inwardly facing
surfaces of the opposed belt conveyors 52 and 54 to move toward the
outer end of the conveyor assembly. Conversely, the outwardly
facing surfaces of the belt conveyors 52 and 54 move toward the
opposite end of the belt conveyors.
The driven rotation of the lower shaft 72 in turn causes rotation
of sprocket 80 secured to one end thereof and through the chain 82
and the sprocket 84 secured to the end of shaft 38, the belt
conveyor 37 is moved in the direction shown in FIG. 1. As will be
apparent from FIG. 1, the upper surfaces of belts 37 and 54 are
substantially coplanar and in view of the previously described
drive mechanism, these belt surfaces move in the same direction and
therefore provide essentially a continuous moving conveyor.
With the machine operating as described, a fabric envelope T--in
the present instance a pillow tickling--is positioned around the
outer surface of the conveyor assemblies 52 and 54 and loosely
encircles the outer reaches of the conveyor belts. In view of the
fact that these outer facing reaches of the conveyor belts are
moving toward the opposite end of the machine, they gently move the
pillow ticking as far forward as possible and hold it there by a
very light frictional contact with the inner surface of the pillow
ticking.
With the machine in this condition, the material which is a
continuous filament tow is fed from a supply source in a crimped,
deregistered, bulked mass of continuous fibrous strands into a
collection area. A predetermined amount of the bulked continuous
filament product is formed into a low-density bat, as indicated by
the numeral B in the shape and weight corresponding to the end
cushion product. The measuring, shaping, and cutting of the
low-density bat from the supply can be accomplished by any suitable
means, for example, a heated wire which is passed through the
continuous filament tow and is normally carried out automatically
by apparatuses known in the art.
The operator then places the bat B into the hopper 92 and allows it
to come to rest on the upper surface of the belt 37, which is
continuously moving, as previously described. The belt 37 moves the
bat forwardly into the inlet end of the conveyor assembly 50 and
the inner surfaces of belts 52 and 54. The bat is further directed
toward this inlet end of the conveyor assembly 50 by the sidewalls
94 and 96 of the hopper which, as seen in FIG. 2, converge toward
the throat area of the conveyor assembly.
As the bat enters the inlet of the conveyor assemblies and
frictionally engages with the opposed faces of conveyors 52 and 54,
it is compressed and drawn into this moving chute-like arrangement
between the material constricting guides 104 and 102, as seen in
FIGS. 1 and 2. The bat moves through the conveyor assembly 50 and
is restricted from any lateral expansion by means of the guides 102
and 104, which are flexible, but are constructed and arranged to
stay within the lateral width of the belts 52 and 54. This
positioning of the guides can be adjusted by means of the screw and
nut arrangement shown in FIG. 6 and indicated by the numerals 106
and 108.
As will be seen in FIGS. 3 and 4, as the bat moves toward the
opposite end of the conveyor assembly, there is an outward
expansion force against the material constricting guides 102 and
104, but by means of the limits of resiliency of the flexible guide
members 102 and the adjustment of the screw and nut devices 106,
the expansion will be restricted within the lateral width of the
belt. In view of this, none of the continuous filament fibers can
be caught on shafts 70 and 71 and wound therearound.
The bat proceeds to the opposite end of the conveyor assembly and
is guided thereby by means of the upper and lower surfaces of the
belts 52 and 54 and the material constricting guides 102 and 104
until it reaches the outer end, at which time, it is ejected from
the conveyor assembly and moves into the open end of the fabric
envelope, or pillow ticking T. As the remainder of the bat is
continuously pushed forwardly by the conveyor belt, it strips off
the pillow ticking T while the bat is being ejected from the belts.
As will be seen in FIG. 5, the completed product is self-ejecting
from the conveyor assembly and after the bat is completely
introduced within the pillow ticking or envelope T, the material is
released from the belt and expands within the envelope to provide a
very low-density, resilient cushion or pillow product. At that
point, all that is required is an operator, or an attendant to
close the open end portion of the pillow ticking and the product is
completed.
It will be readily recognized that while the present invention has
particular applicability to synthetic continuous filaments, such as
nylon, polyester cellulose acetate, cellulose triacetate, rayon
acrylics, modacrylics, polyethylene, polypropylene,
polyvinylchloride, and the like, bats of natural fibers and/or
mixtures thereof with continuous or staple synthetic filaments can
be used with correspondingly good results.
As many changes could be made to the above structures without
departing from the scope of the invention, it is intended that all
matter contained in the above description and shown in the
accompanying drawings shall be interpreted as illustrative and not
in a limiting sense. For example, the material constricting or
retaining guide members which restrict the expansion of the
continuous filament tow within the width of the belt do not
necessarily have to be contiguous with the hopper side members.
Furthermore, the specific arrangement of driving the belts and
conveying the material into the belt conveyor assembly is not
necessarily required for a full appreciation of the improvement and
the benefits gained from the material constricting guides used in
combination with the belt conveyors. Furthermore, various other
procedures embodying the principles disclosed in the foregoing may
be suggested to those skilled in the art. Accordingly, it is
desired that the accompanying claims be accorded the broadest
reasonable construction consistent with the language appearing
therein and the prior art.
* * * * *