US2642032A - Roll-stripping means for cementing machines - Google Patents

Description

June 16, 1953 w, P, os oo 2,642,032

ROLL-STRIPPING MEANS FOR CEMENTING MACHINES Original Filed April 12, 1950 7 1 {/2 FIG.

INVENTOR {jg WALTER F. 056000 ww m Arr'rs Patented June 16, 1953 norznsrmrrme MEANS FOR CEMENTING Q MACHINES Walter P. Osgood, Maiden, Mass, assignor to Boston Machine Works Company, Lynn, Mass., a corporation of Massachusetts 1 Original application April 12, 1950, Serial No.

" 155,543. Divided andcthis 'applicati n 1950, Serial No. 201,182

c Gianna; (Cl. 118-245) This application is divided from application, Serial No; 155,543, filed April 12, 1950, for Cementing Machine. The invention 'relates to inn provem'ents in mechanisms for applying a film of liquid adhesive to pieces of sheet materi'alsuch I as thin leather which has been out to form various shapes for use in shoe uppers, thefilm being applied by means of a rotating roll which dips into a pool of the adhesive. More particularly,

forward post 23 and a rear post, not shown. A shaft 3 extends through theupper portion of the post 28 and through the opposite portion of the wall 24, this shait'having a portion which projects out beyond the base 20 to upp rt some of the pulleys which are employed in the drivmg mechanism. The part B comprises a trough '52 in-which is rotatably mounted a coating roll 54 and a receptacle '52 which is adapted to receive an inverted bottle or jar 14 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 the invention relates to improved means for '10 receptacle l2." This receptacle. is connected with strippingfrom the roll work pieces which have the trough 52 so that the pool of cement i th been applied thereto to receive a coating of adtrough is maintained at a predetermined level hesive. as long as there is a reserve supply in the jar l4. According to the invention, stripper fingers 'Theforward edge of the trough 52 has a lip'afi are provided, together with convenient and cites. 15 to which is detachably secured a suitable doctor tive support means therefor, which can quickly blade 83. A pair of set screws 90 bear against and easily be mounted in place for use'or removed the edge of the lip 86 and are adjustable to regufrom the machine for cleaning or replacement. late the clearance between the edge of the doctor For a more complete understanding of the in- 88 and the surface of the coating roll 54. In vention, reference may be had to the following order to secure the doctor to the lip'86, a pair description thereof and to the drawing, of of bolts or screws 92 having Wing heads 94 at which- I one end and plain heads 96 at the other end are Figure 1 is a plan view of a cementing mascrew threaded through the doctor blade 83; chine which includes an embodiment of the in- On the opposite side of the roll are mounted ti stripping fingers me. These are supported by Figure 2 is a section on the line 2-2 of Figure a bar H32 which is rockab i ted so as to extend parallel to the trough and coating roll. Figure 3 is a fragmgntary e1evation of one 0f A center not which is fixed in an ear I06 at the the stripper fingers, on a larger scale, showing end of the trough 52 enters one end of the .bar itsrelation to the supporting bar. 192; a 06111781 3 carried y a Spring I"! W ich. The machine illustrated on the drawing is a mounted on a Side Wall Of the p ac T2 portable bench type of machine consisting of enters the other end of the bar 102 so that the three majgr parts which can be easi1y disas barcan readily rock about these centers. The sembled. The part designated A includes a base uppsr face Of the barv is transversely slotted in 26 which carries a suitable electric motor, the 35 sevml 1913409538 at HZ, these slots being sli position of the motor being indicated in' broken 3' Wider a the thickness of the pp fi rs lines at 22. The part A also carries a work table, 9- I AS indicated in Figures 2 d 3, the ba "3 pulleys belts, and haft The vpart B is is transversely inclined so that it slopes downtachably secured to the part A and includes a a oward the trough 52 at an angle 0f ptrough for holding a pool of liquid cement, means 40 PTOXimBJtQIY although it is horizontal g for maintaining the pool at a constant level, a .illldinally- "Each Stripping fi e I9 is p fcoating roll dipping into the pool a doctor to b y made from Sheet material /8 Of an inch regulate the thickness of the film carried by the thick 50 that it has parallel S e fa es- 'Each coating 11 and st i ping'means. The part c finger has a base portion M4 which is slotted-as is hinged to the part A and consists of a frame at Mt so that the base of the finger can be'slid which supports two feeding and guiding rolls on to the'bar m2 at one of the 'slots [[2, the and a guide plate above the coating roll. thickness of the bar where it is slotted being Rising from the base as is a wall 2% which e xslightly less thanth'e width of the slot I I6. The tends from irontto rear. Parallel to the wall Ell upper portion of each finger N30 is a head 'I I8 is a second wall 26 which extends between a tapering to a point I25 which is adapted to rest against the surface of the roll 54%. Ihe under edge #22 of 'the'head is arcuate, itscurve being substantially tangentto' the curvature of the roll surface as it curves gradually away from the sur face of the roll downward from the point I20.

The upper edge of the head I I8 is bevelled on both sides as at I24 to an edge so that the point I is the intersection of three planes. As indicated in Figure 3, the slot H6 is slightly wider than the slotted thickness of the bar I02, this difference being exaggerated in 'Figure 3. A finger can quickly be mounted on the bar I02 by aligning its slot II6 with a slot H2 and moving it forward across the bar until the tip I20 touches the roll. The downward pull of gravity on @the finger and the reactive upward pressure of the roll against the tip I 20 of the finger tend to cause the finger to rock in a clockwise direction as shown in Figures 2 and 3 so that it presses against the upper face of the bar I02 at the ,point I20 and against the lower faceof 'thebar at thepoint I23. Thus the fingers I00 on the bar normally impress a torque of small magnitude tending to rock the bar in a clockwise direction. A bracket I is secured to the bar and extends downward. This bracket is supplied with :a .set screw I32 which bears against the rear face of the part E to act .as an adjustable stop tor'the clockwise rocking movement of .the bar I02 whereby the ,angle of transverse inclination of the :bar :can :be regulated. The bar, as seenin Figure. 2, is free to rotate in a counterclockwise direction such rotation being opposed by the engagement :of the fingers I00 against the roll '54. This'method of mounting the stripper fingers is particularly advantageous sincethe nose of each finger bears lightly but constantly againstthe surface of the roll. The two methods of mounting stripper fin gers heretofore in use are the rigid gang-amounting of a number of fingers on a bar adjacent to the roll, and the individual mounting of fingers rock- 'ably on a cylindrical bar in such a manner as to let them bear against theroll-by theirown weight :and be .free to rock away from the roll. llhe first method is troublesome because .of the dif- "ficulty of adjusting the fingers for-uniform bearing of all the fingers 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 tozfiop over away from the roll. According to thepresent mounting of the fingers, the fingers areindividually 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 atransverse frame member I40 extending substantially the full width of the :machine and supporting two rotatable rolls I42 and I544. The frame I40 has "a'pair of integral farms I41 and I448 throughwhich extends the fixed shaft 34, this shaft acting as a hinge pin about-which the partC can be rocked forward. The rolls I42 and I44 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 sup- .ported above it. The guide rolls I42 and I44 are "spaced apart to provide aclearance 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 144 and the coating roll 54 is likewise greater than the thickness of the material ied thereto. In order to prevent any sagging of the rolls I42 and I44, the frame I40 Jmay be stifiened by a truss rod I which is secured to cars I52 and I 54 projecting up from the top of the frame I40. The frame .I 40 also carries a guide blade I which slopes from the forward edge of theframe rearwardly toward the clearance between the rolls I42 and I44, as indicated in Figure 2, 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 to rotate toward each other with peripheral speeds greater than the peripheral speed of the coating roll 54.

The coatingroll :54 and the guide rolls I42 and I 14 are driven by any suitable means such as the beltand pulley connections shown in Figure l. .A motor shaft is indicated at I'IIl, a pulley wheel .-I.l2 being mounted on this shaft. A belt II'4connects the pulley wheel I72 to the middle sheave 1-16 .of a triple pulley, the other two sheaves J18 and I being on a common hub with the sheave 'I'IB, this hub being rotatably mountedzon the shaft 34. 'A belt I82 extends from the sheave I78 to an idle pulley I04, the upper stretch of this belt passing between the rolls I42 and I44 which are grooved to receive the belt. A third belt [750 extendsirom the sheave I80 to the pulley wheel :40 to drive the coating roll. Since the part C swingsabout the shaft .34 as an axis, and since the sheave I78 revolves about the .same axis, the part C can be swung back without disturbing the drive connections by which the rolls I42 and I44 are rotated when the machine is in operation. To limit the swing of the part C, the adjusting screw I40 is so located that its head engages a horizontal rod 200 as astop member, this horizontal rod being mounted at oneend on .an upright post 202 which is secured to thebasei2f0. Thehorizontal rod 200 also supports a work table 204 which extends from the rod toward the guide .rolls I42 and I44. Arpin 203 .extendsihorizontally from the lug I4! to support therear portion of the .table 204. Hence thetablemust beswung out of the way before the part C can be swung to its inoperative position.

When it .is .desired to .use the machine, a jar or flask 'l'I'4 .of suitable cement is inverted and placed in the receptacle "I2. The motor is started and .pieces of work are slid manually on the table top 204 until the leading edge of each work piece engages thegguide roll I42. The roll then acts tofeed the workpiece along, theileading edge being deflected downward by the guide blade I60 until itis further deflected by engagement with the guide roll I 44. Since the latter is also driven, ithelps .to'feed the work piece along. The lead- .ing 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 along until it is stripped from the roll by the fingers I00 which it encounters. This arrangement ofparts is efiective to properly feeding and guiding workpieces of such material as split 'leather having irregular contours, with- .out 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 table204is swung up to get it out of the way of the part C. The latter is then swung up to re water to remove residual cement therefrom. The

bar I02 with the fingers I00 thereon can be quickly removed from the centers I04 and I08 by pressing on the spring IIO, 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. In a coating machine which includes a trough for liquid cement and a driven roll mounted in said trough, means for stripping from said roll work pieces which have been applied thereto to be coated, said stripping means comprising a support member rockable about an axis parallel to the axis of said roll, and a plurality of stripper fingers on said support member each slidable independently thereon toward said trough, said support member and fingers having mutually engaging surfaces locking said fingers against appreciable rocking movement relative to the support member about the axis of the latter.

2. In a coating machine which includes a trough for liquid cement and a driven coating roll mounted in said trough, means for stripping from said roll work pieces which have been'applied thereto to be coated, said stripping means comprising a fiat bar extending parallel to said roll and transversely sloping downward toward the trough, and a plurality of stripper fingers independently slidable on said bar toward or from said roll, each said finger having a base portion with a slot receiving said bar with a sliding fit to support the finger and an upper portion terminating in a point resting against the periphery of said roll.

3. In a coating machine trough for liquid cement and a driven coating roll mounted in said trough, means for stripping which includes a from said roll work pieces which have been applied thereto to be coated, said stripping means comprising a fiat bar extending parallel to said roll and transversely sloping toward the trough, said bar having transverse grooves in a face thereof, and stripper fingers independently slidable on said bar toward and from said roll, each said finger being of sheet material of a thickness slightly less than the width of said grooves and comprising a base portion with a slot adapted to fit slidably on said bar at one of said grooves and a head portion terminating in a point resting against said roll.

4. In a coating machine which includes a trough and a horizontal coating roll rotatably mounted therein, means for stripping from said roll work pieces which have been applied thereto, said stripping means comprising a flat bar parallel to said roll, means rockably supporting said bar outside of and adjacent to said trough, said means including a fixed center extending into one end of said bar, a second center extending into the other end of said bar, and a spring element attached to said trough and second center and arranged to press said second center yieldingly into said other end of the bar, stop means for limiting rocking movement of said bar in a direction away from said roll, and a plurality of stripper fingers slidable on said bar, toward or from said roll, each said finger having a base portion with a slot adapted to receive a portion of the bar and a headportion with a pointed extremity adaptedto bear against the surface of the roll, said bar normally sloping transversely downward toward said trough.

WALTER P. OSGOOD.

References Cited in the file of this patent UNITED STATES PATENTS Number Name I Date 872,392 Von Auw Dec. 3, 1907 1,804,365 Price May 5, 1931 2,225,457 Langsuer Dec. 17, 1940

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