US2664068A - Cementing machine fob - Google Patents

Description

Dec. 29, 1953 w, 05 000 2,664,068

CEMENTING MACHINE FOR THIN FLEXIBLE SHEET MATERIAL Flled April 12. 1950 3 Sheets-Sheet 1 FlG.l 9

I VINVENTOR m2 WALTER P. oseooo Dec. 29, 1953 w. P. oseooo CEMENTING MACHINE FOR THIN FLEXIBLE SHEET MATERIAL 3 Sheets-Shaet 2 Flled April 12, 1950 INVENTOR WALTER P. OSGOOD Dec. 2 9, 1953 w. P. ossoop 2,664,068

CEMENTING MACHINE FOR THIN FLEXIBLE SHEET MATERIAL Flled April 12, 1950 3 Sheets-Sheet. 3

INVENTOR WALTER F. 056000 p 'Q ED UNA, m

Patented Dec. 29, 1953 UNITED STATES PATENT OFFICE CEMENTING MACHINE FOR THIN FLEXIBLE SHEET MATERIAL Application April 12, 1950, Serial No. 155,543

2 Claims. I

This invention relates to an improved machine for applying a coating of liquid, such as an adhesive cement, to a face of pieces of thin flexible sheet material such as split leather or a fabric. More particularly, the invention relates to a machine capable of coating a face of small pieces of thin leather having irregular shapes which make it hard to coat them successfully in cement ing machines heretofore in use.

It is an object of the invention to provide a cementing machine in which oddly shaped pieces can be readily coated without being crumpled or tangled in the machine as is apt to happen in prior cementing machines intended for similar uses.

A further object of the invention is to make possible the quick and easy washing of all the parts of the machine touched by the liquid ceient. In the manufacture of footwear the process of assembling the upper often includes attaching small pieces of leather of peculiar shapes for purposes of reinforcement or ornamentation. For this purpose, a liquid cement containing a rubber latex is customarily employed. When such cement dries, the dispersed rubber particles coalesce and form a rubbery solid. If such cement dries in or on any part of the machine, the resulting solid is diflicult to remove thoroughly. .l-lence, when there is a y material interruption in the use of the machine as at a lunch hour, it is desirable to rinse ofi all the parts of the machine which are washed by the cement since this can readily be done while the. cement is liquid. The present machine is constructed to facilitate a sufiicient disassembling of parts for quick and thorough rinsing, and an easy reassembling of the parts.

The machine embodying the present invention includes improved means for advancing the work pieces in the process of being coated and improved stripper fingers which separate the work pieces from the coating roll. These and other advantageous features are set forth in more detail in the followin description of the invention and on the drawings, of which- Figure 1 is a front elevational view of a cementing machine embodying the invention;

Figur 2 is a plan View of the same;

Figure 3 is a side view of the machine;

Figure 4 is a section taken on the line 4-4 of Figure 1, on an enlarged scale;

Figure 5 is a fragmentary side elevation of one of the stripper fingers, on a larger scale, showing its relation to the'supporting bar;

Figure 6 is a section on the line 66 of Figure 1;

Figure '7 is a section on the line 7 of Figure 6;

of the coating roll and driving connection there- I for.

The machine illustrated on the drawings is a portable bench type of machine consisting of three major par-ts which can be. easily disassembled. The part designated A includes a base '20 which has feet 2| adapted to rest on a horizontal supporting surface and which carries a suitable electric motor, the position of the motor being indicated in broken lines at .22. The part A also carries a work table, pulleys, belts, and shafts as hereinafter described in detail. The part B is detachably secured to the part A and includes a trough for holding a pool of liquid cement, means for maintaining the pool at a constant level, a coating roll dipping into the pool, a doctor to regulate the thickness of the film carried by the coating roll and stripping means, all hereinafter described in detail. The part C is hinged to the part A and consists of a frame which supports two feeding and guiding rolls anda guide plate above the coating roll as hereinafter described.

Rising from the base 20 is a wall 24 which extends from front to rear, the top edge of the wall having an irregular outline as indicatedin Figure 9. Parallel to the wall 24 is a second wall 26 which extends between a forward post 28' and a rear post 30, these posts being thicker than the wall 26. A transverse wall 32 extends from the post 28 to the portion of the wall 24 which is directly opposite. As indicated in Figures 1 and 8, the transverse wall 32 is only a little over half the height of the wall 24 and post 28. A shaft 34 extends through the upper portion of the'post '28 throu h the opposite p rti n of the wall 24 as indicated in Figures -2 and 29, this shaft having a portion whichqprojects out beyond the base 20 to support some of the pulleys which are employed in the driving mechanism. The rear post .30 contains a bearing member 36 near its upper end -(Figure 8). Acorresponding bearing member .38 is mounted in the opposite portion of the wall 24. Journalled in these bearings is a shaft 40. which has a pa f co lars 42 n 44 thereon to prevent axial displacement oi the aft. A suitable pulley wheel 46 s mounted n a p rtion of the, shaft which projects outward from the post 30. This shaft drives the coating roll as hereinafter described. A supporting rod 3 50 is fixed in the wall 24 below the bearing member 38 for the purpose of supporting the part B.

The part B comprises a trough 52 in which is rotatably mounted a coating roll 54, this roll being supported at one end by a fixed center 55 and at the other end by a center 58 which is an extremity of the shaft 40, suitable central apertures being supplied in the ends of the roll 54 to receive the centers 56 and 58. Projecting down below the trough 52 are two lugs 80 and 62. The lug 50 is slotted from below as at 64 to receive the fixed rod 50. The outer end 56 of this shaft fits in a hole in the lug 62. A set screw 68 (Figure 7) is threaded through a bushing 69 in the lug 60 so as to bear against a tapered portion of the rod 50. When the part B is assembled with the part A, it is moved toward the part A when the rod 50 has been aligned with the slot 64 and the hole in the lug 52. When the part B is then moved up into engagement with the part A, the set screw 68 is set up against the tapered portion 10 of the rod 50, the slope of the taper tending to press the part B firmly against the part A. The part B thus is held in an upright position by the engagement of a projecting portion of the bearing member 38 (Figure 8) in a hole II in a wall of the trough 52, this hole being opposite to and aligned with the center 58. Thus, by backing off the screw 68, the entire part B can be removed from the part A.

The rod 50, the trough 52, the roll 54 and other adjacent members parallel thereto may be and preferably are considerably longer than indicated in Figures 1, 2, and 8 of the drawings. These parts have been shortened in Figures 1, 2, and 8 so that the parts of the machine can be shown on a larger scale than would otherwise be possible.

The part B also includes a receptacle I2 which is adapted to receive an inverted bottle or jar I4 containing a supply of liquid cement. When a jar of cement is inverted and placed in the receptacle, the cement escapes from the jar until the mouth of the jar is sealed by the pool of cement in the receptacle 12. This receptacle is connected by a passage with the trough 52 so that the pool of cement in the trough is maintained at a predetermined level as long as there is a reserve supply in the jar I4.

Within the trough 52 are a number of temporary supporting lugs I8 on which the roll 54 rests when the part B is removed from the part A. These lugs support the roll slightly below its normal operating position so that when the part B is moved into assembled relation with the part A, the roll 54 is sufficiently aligned with the shaft to receive the pointed extremity thereof in the recess at the corresponding end of the roll. When the part B moves into engagement with the part A, the roll is cammed by the conical centers 56 and 58 into its proper operating position in line With the shaft 40. A simple driving connection between the shaft 40 and the roll 54 is made by a transverse pin 80 in the pointed end 58 of the shaft, the projecting ends of the pin 80 being adapted to engage in a transverse slot 82 in a reduced projection 84 at the end of the roll 54 (Figure 10). Just before the part B is assembled with the part A, the shaft 40 is turned until the pin 80 is vertical and the roll 54 is turned until the slot 82 is vertical. the two parts are then brought together, the projecting ends of the pin 80 register with and enter the slot 82 to connect the roll 54 operatively with the shaft 40. This arrangement simplifies When 4 and expedites the operation of assembling parts Aand B.

The forward edge of the trough 52 has a lip 88 to which is detachably secured a suitable doctor blade 88 (Figures 1 and 4) A pair of set screws 90 bear against the edge of the lip 88 and are adjustable to regulate the clearance between the edge of the doctor 88 and the surface of the coating roll 54. In order to secure the doctor to the lip 86, a pair of bolts or screws 92 having wing heads 94 at one end and plain heads 96 at the other end are screw threaded through the doctor blade 88. These bolts pass freely through notches in the lip 0 that when the doctor is to be mounted on the lip 86, the blade 88 is placed thereon so that the bolts 92 register with the respective notches. The blade is then pushed toward the roll until the ends of the set screws 90 engage the edge of the lip. The doctor is held in such position while the bolts are rotated to draw the doctor firmly against the lip 86. As indicated in Figure 4, when the machine is being operated and the coating roll 54 i being rotated, the type of rubber-containing cement customarily used in shoe manufacture is of such a consistency that it heaps up in the space between the surface of the roll, the side of the trough and the doctor so as to fill such space. The clearance between the edge of the doctor and the roll determines the thickness of the film of cement carried up by the roll from the pool.

On the opposite side of the roll are mounted stripping fingers I00. These are supported by a bar I02 which is rockably mounted so as to extend parallel to the trough and coating roll. A center I 04 which is fixed in an ear I06 at the end of the trough 52 enters one end of the bar I02; a center I08 carried by a spring IIO which is mounted on a side wall of the receptacle I2 enters the other end of the bar I02 so that the bar can readily rock about these centers. The upper face of the bar is transversely slotted in several places as at H2, these slots being slightly wider than the thickness of the stripper fingers I00. As indicated in Figures 4 and 5, the bar I02 is transversely inclined so that it slopes downward toward the trough 52 at an angle of approximately 30 although it is horizontal longitudinally. Each stripping finger I00 is preferably made from sheet material of an inch thick so that it has parallel side faces. Each finger has a base portion II4 which is slotted as at II8 so that the base of the finger can be slid on to the bar I02 at one of the slots II2, the thickness of the bar Where it is slotted being slightly less than the width of the slot I I6. The upper portion of each finger I00 is a head II8 tapering to a point I20 which is adapted to rest against the surface of the roll 54. The under edge I22 of the head is arcuate, its curve being substantially tangent to the curvature of the roll surface as it curves gradually away from the surface of the roll down ward from the point I 20. The upper edge of the head H8 is bevelled on both sides as at I24 to an edge so that the point I20 is the intersection of three planes. As indicated in Figure 5, the slot I I6 is slightly wider than the slotted thickness of the bar I02, this difference being exaggerated in Figure 5. A finger can quickly be mounted on the bar I02 by aligning its slot IIB with a slot H2 and moving it forward across the bar until the tip I 20touches the roll. The downward pull of gravity on the finger and the reactive upward pressure of the roll against the tip I20 of the finger tend to cause the finger to rock in a clockwise direction as shown :11: P18- ures .4 and 5 so that it messes against the upper face of the bar I02 at the point-l 26 and against the lower face of the bar at the point 128. Thus the fingers 100 on the bar normally imprem a torque of small magnitude tending to "rock'the bar in a clockwise direction. A bracket I30 is secured to the bar and extends downward. This bracket is supplied with a set screw132 which bears against the rear edge of the lug 62 to act as an adjustable stop for the clockwise rocking movement of the bar I02 whereby the angle of transverse inclination of the bar canlbere lated. The bar is free to rotate in a counterclockwise direction, such rotation being opposed by the engagement-of the fingers int against the roll 54. This method of mounting the stripper fingers is particularly advantageous since the nose of each finger bears lightly but constantly against the surface of the roll. The two methods of mounting stripper fingers heretofore in use are the rigid gang-mounting of a number of fingers on a bar adjacent to the roll, and the individual mounting of fingers rockably on a cylindrical bar in such a manner as to let them bear 4 against the roll by their own weight and be free to rock away from the roll. Theiirst method is troublesome because of the difficulty of adjusting the fingers for uniform bearing of all the fin-- gers against the roll. The second method is troublesome because of the frequency with which the work pieces drag on some of the fingers and cause them to flop over away .fromthe roll. .According to the present mounting of the fingers, the fingers are individually held lightly against the roll by gravity but cannot rock away from the roll. Each finger can be instantly mounted on or removed from the bar and is automatically self-adjusting.

The part C consists primarily of a transverse frame member I40 extending substantially the full width of the machine and supporting two rotatable rolls I42 and I44. The frame .I40 has a pair of integral arms I41 and I48 through which extends the fixed shaft 34, thi shaft acting as a hinge pin about which the part C can be rocked forward. The 'rol'l's I42 and 144 which are carried by the frame I40 are parallel to each other and to the coating roll 54. They are preferably of smaller diameter than the roll 54 and are supported above it. The guide rolls I42 and I44 are spaced apart to provide a clearance between them which is greater than the thickness of any material which is to be fed to the machine for coating. The clearance between the rolls I42 and I44 and the coating roll 54 is likewise greater than the thickness of the material fed thereto, but this clearance is made adjustable by a set screw I46 which extends through the frame I40 and bears on the top of the wall 24 (Figure 9). In order to prevent any sagging of the rolls I42 and I44, the frame I40 may be stiffened by a truss rod I50 which is secured to ears I52 and I54 projecting up from the top of the frame I40. The frame I40 also carries a guide blade I60 which slopes from the forward edge of the frame rearwardly toward the clearance between the rolls I42 and [44, as indicated in Figure 4, so that a piece of flexible sheet material such as split leather which is fed toward the guide rolls is guided by the blade I60 down between the two rolls and against the top of the coating roll 54.

The guide rolls I42 and I44 are driven so as torotate toward each other with peripheral speeds greater than the peripheral speed of th coating roll 54. the rolls land 1144 orbetweeneither .01 these rolls. and the .54. the feeding rimctionvof the roll I 42 is purely frictional but is ordinarily suf- "ficient to push'the work piecegently against the surface :cf drecoating roiiiflzso that more or less ofza'festoon is formed at vthe point "I82 where the work piece face comes into engagement with the coating m'lLnwing to theiowerperipheral speed 0f the latter. I

The coatingaroli 54am thegu'iderolls I42 and l44m'drivenbyanyxmitable means such as the belt and pulicyconnections shown in Figures 1,1, and 3. Amotorshaft "is indicated at no,

'a I12 beinginounted on this shaft. A belt I14 connects the puileywheel 112 to the middle sheave Il iiof aia'lpiepulleyjhe other two sheaves 11B and! being on a common hub with the'sheave .Il6 ,'this-;hnb being rotatably moimted on the shaft 34. 3A belt 182 extends from. the sheave 118 :to an 'ldlc pulley I84,ithe upper-stretch of this belt passing between the rolls I42 ifl'resindioated' in .Figure 3, the rollsbeing" grooved to receive the belt. It is evident 'fmmthis' arralignment that the belt drives therrolis 'at'equal speeds but in opposite directions, the rolls being made to revolve toward each other. A third belt extends from the sheave im'tothe pulley wheel 46, the latter being mounted on the shaft 44 to drive the coating roll when the roll isopemtively connected to the shaft!!! as hereinbefore described. Since the part C swings about the shaft as an axis, and since the sheave H3 revolves about the same 1 axis, the part C can be swung back to the position shown in broken lines in Figure 9 without disturbing'the drive connections by which the rolls 2 and I44 are rotated when the machine is in operation. To limit the swing of the part 0, the adjusting screw 346 is so located that its head ges a horizorrtal'nod 200 as a stop memher, this horizontal rod being mounted at one end on an auprightpost 202 which is secured to thehase *20. The horizontal rod 200 also supports a. work table 204 which extends from the rod towandithe guide rolls 1-42 and I44. The table 204 has a ooupleof sleeves 2 06 on its under face frictionally engaging the rod 200 so as to permit the table to be swung up and forward when access to the thumb screws 94 is desired, these thumb screws being normally under the table as indicated in Figure 4. A pin 208 extends horizontally from the lug I41 to support the rear portion of the table 204. Hence the table must be swung out of the way before the part C can be swung to its inoperative position.

When it is desired to use the machine, the machine is supposed to be clean and in the assembled condition illustrated in Figures 1 and 2. A jar or flask 14 of suitable cement is inverted and placed in the receptacle I2. Cement from the jar flows through the'passage I6 to create and maintain a pool of cement in the trough 52. The motor is started and pieces of work are slid manually on the table top 204 until the lea-ding edge of each work piece engages the guide roll I42. The roll then acts to feed the work piece along, the leading edge being deflected downward by the guide blade I60 until it is further deflected by engagement with the guide roll I44. Since the latter is also driven, it helps to feed the work piece along. The leading edge meets the surface of the coating roll 54 which has picked up a film of cement from the pool in the trough. This roll carries the work alonguntil it is stripped 7 from the roll by the fingers I which it encounters. This arrangement of parts is effective to properly feeding and guiding work pieces of such material as split leather having irregular contours, without causing the work pieces to buckle or jam in the apparatus. Before sending any work pieces through the machine, stripper fingers I00 may be arranged on the bar I02 according to the size and shape of the work pieces to be coated. Since cement which contains rubber latex coagulates upon drying and is then difficult to remove, it is desirable to wash promptly all parts touched by cement whenever the apparatus is to be left idle even for a brief period such as a lunch hour. When a substantial pause in operation is expected, the jar I4 is removed from. the receptacle and the table 204 is swung up to get it out of the way of the part C.- The latter is then swung up to remove the guide rolls I42 and I44 from their normal position directly over the coating roll 54. The set screw 60 is then backed off leaving the part B free for removal from the part A. The remaining cement in the trough 52 and receptacle I2 can be dumped into a suitable container and these parts promptly washed with water to remove residual cement therefrom. The bar I02 with the fingers I 00 thereon can be quickly removed from the centers I04 and I08 by pressing on the spring H0, and the coating roll 54 can be lifted from the trough to facilitate the washing. These operations can be very quickly and easily performed so that the machine is soon clean and can be at once reassembled to be ready for further operation.

I claim:

1. A machine of the class described comprising a base, a horizontal shaft rotatably mounted on said base with an end portion projecting therefrom, a fixed rod projecting from said base parallel to said shaft, said rod having a portion inwardly tapering toward the base, a unit securable to said base, said unit having holes through which said shaft and rod project when the unit and base are secured together, said unit including a trough, a horizontal roll rotatably mounted in said trough in operative engagement with said 8 shaft, and means for maintaining a pool of liquid in-said trough, and means for detachably securing said unit to said base, said securing means consisting of a screw threaded through a portion of said unit and pressing against the tapering portion of said rod.

2. A coating machine comprising a base, a horizontal shaft rotatably mounted on said base, a trough with a hole in an end thereof detachably secured to said base, said shaft having a conically pointed end portion projecting from said base and through said hole, a fixed conically pointed center mounted in the other end of the trough in line with said shaft, a roll having central conical recesses in its ends normally fitted by said conical ends of the shaft and center to support the roll, said trough being movable endwise when released from the base to disengage the roll from the shaft, and means within the trough for supporting the roll with said recesses opposite the points of said shaft and center when the roll is disengaged from the shaft and said hole and center are aligned with said shaft, whereby the roll is cammed up into alignment with said shaft and center by movement of the trough endwise to its normal position against the base.

WALTER P. OSGOOD.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 219,963 Mather Sept. 23, 1879 920,367 Morse May 4, 1909 1,127,538 Staude Feb. 9, 1915 1,192,380 Brackett July 25, 1916 1,255,245 Taylor Feb. 5, 1918 1,331,463 Streeper Feb. 17, 1920 1,842,063 Becker Jan. 19, 1932 2,003,736 Brown June 4, 1935 2,297,015 Osgood Sept. 29, 1942 2,341,160 Osgood Feb. 8, 1944 2,480,786 Steinhilber Aug. 30, 1949 2,517,746 Whelton et al. Aug. 8, 1950 2,536,108 Sullivan Jan. 2, 1951 2,567,234 Phillips Sept. 11, 1951

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