US1175596A - Leather-edge-burnishing machine. - Google Patents

Description

V. P. BUCK. LEATHER EDGE BURNISHING MACHINE.

APPLICATION FILED MAY 14. 1914.

Patented Mar. 14, 1916.

witnesses.-

@GIJW THE COLUMBIA PLANOURAPH 520.. WASHINGTON, D. C.

nr'rn era.

VERTRUDE F. BUCK, 013 BOSTON, MASSACHUSETTS.

LEATHER-EDGE-BURNISHING MACHINE.

Specification of Letters Patent.

Patented Dial. 14c, 1918.

Application filed May 14, 1914. Serial No. 838,608.

To all whom it may concern: 4

Be it known that I, Vnnrnoun P. BUCK, a citizen of the UnitedStates, residing at Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Leather-Edge-Burnishing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention consists in an improved machine for finishing the edge of leather by rounding and smoothing the same so that such edge shall present a satisfactory appearance. The said machine is adapted for use upon upper leather, and also upon leather for the manufacture of various articles other than shoes. The finishing operation renders unnecessary the folding or turning over upon itself of the marginal portion of the leather heretofore customary.

In my machine I combine a burnishing device or tool which engages the edge of a piece of leather toround and smooth the said edge, and automatic adjustment-means which operates under the control of the thickness of the said piece to maintain a constant relationship between the acting portion of the burnishing device or tool and the angle or corner of the edge of the leather at the upper face of the leather in the case of all variations in the thickness of the leather. In the illustrated embodiment of the invention, the burnishing device or tool is'provided with 'a burnishing groove, and the adjustment-means is combined operatively with the burnishing :device or tool to maintain the constant relationship just mentioned. The drawings, however, showbut one manner of carrying the invention into e'fi'ect. It is to be understood that the invention is not necessarily restricted thereto. Prior machines for the same general purpose have been of two types, namely those having reciprocating burnishing devices or tools and those having rotary burnishing' devices or tools. The principles of the invention are equallyapplicable to machines of both types.

I have shownthe saidprinciples embodied in a machine containing a rotary burnishing device or tool, but the application thereof to a machine containing a reciprocating burnishing device or tool will be apparent to those skilled in the art. I

In the drawings, Figure 1 shows in front elevation, with the machinebase in vertical longitudinal section, a machine containing the said embodiment.

Fig. 2 is a bottom view of the said machine.

Having reference tothe drawings, the machine shown therein has a hollow base 1, within which the driving mechanism and connections and certain of the working parts are mounted. The top surface of said base is used as a work support. From the base IISGS. an armor goose-neck 2, in the head of which the stem or spindle of the presser-device is mounted. Withinthe base a feed-wheel 3 is mounted, to serve in advancing pastthe burnishing device or tool the piece of leather which is operated upon. For the convenient mounting of the said feed-wheel, an axial stud 4- connected therewith is fitted within a bearing in a block'5 that projects downward within the base from the top thereof. The place in the bearing, and the feed-wheel in its proper working position, by means of a groove 4* in the portion of the said stud that occupies the bearing and a screw 6 which is fitted to a threaded hole tapped in the bottom portion of the block 5, the said screw having a reduced inner end which enters the said groove. In the working position of the. feed-wheel the top portion thereof occupies a slot in the top of the base 1, and projects slightly above the upper surface of thebase in order that it may engage with the leather resting on such surface. Withdrawalof the screw 6 to an extent suflicient to disengage its inner end from the groove P will unlock the stud so as to permit the latter to he slid out of the bearing and the feed-wheel to be removed. j

To provide for rotating the feed-wheel 3, the latter has attached to it a miter-gear 7, with which meshes a miter-gear Shaving its stud 9 fitted to a bearing in the block 5. The

said stud 9 has an annular groove 9 which 1s occupied by the inner end of a retaining screw 10, thus providing for retaining the miter-gear 8 in working relations with the miter-gear 7, and for its disengagement or removal. Worm-gear 11 is attached tothe said miter-gear 8, and with said worm-gear engages a worm 12 upon one end of a horizontal shaft 18 extending lengthwise of the machine andjournaled in bearings at 14, 14,

stud 4 is kept in whichare provided in connection with the 7 base at the opposite ends of the latter. The said shaft 13'has thereon at its other end a worm-gear15, which is engaged by a worm 16 upon atransverse rotating shaft 17 that is journaled in bearings 18, 18, with which the base 1 is provided. Through the described connections the feed-wheel 3 is driven from the shaft 17.

The presser 19, which bears upon a piece of leather passing between it and feedwheel 3 so as to hold the leather firmly in contact with the periphery of the said wheel, to insure the feeding of the leather as'well as clamp the leather between two confining surfaces alongside the place where the 3 ing against the edge, is in this instance a wheeler roll journaled in a yoke carried by the lower end of a presser-bar 21 working in guides 22, 23, in connection s with the head of the arm or goose-neck 2.

The guide 22 is in the-lower portion of the said head, and the lower portion of the presser bar 21, which is larger 'in'diameter than the upper portion of the Presser-bar,

occupies the said guide.

' its position to the thickness of the leather passing between the feed-wheel and the presser. 'The guide-sleeve 23 is vertically adjustable. The adjustability is secured by screw-threading the said sleeve externally,

and internally threading the bore in the head which is occupied by the sleeve. For convenience in turning the sleeve by hand in making adjustment, the upper end of the sleeve is furnished with a knurled head or flange 24-. The sleeve is locked in adjusted position by means of a clamping screw 25, provided with a knurled head for convenience in turning the same'by hand,

and having its threaded stemfitted within a threaded hole that is tapped through the front of the head, the inner endof the said screw 25 being adapted tobind against the threaded portion of the sleeve. WVhen the screw is tightened up against the sleeve the latter is held from accidental turning. When the screw 25 is loosened the sleeve is free to be turned so as to adjust the same up or down. is pressed with yielding force toward the feed-wheel 3 by means of an expanding spiral spring 26, which is confined in'a more or less compressed state between the lower endof the sleeve 23 and the shoulder at the junction of the reduced portion of the presser-bar with the larger lower portion of the presser-bar.

The burnishing deviceor tool embodied in the machine shown in the drawings consists of a wheel 27 having a peripheral groove 28 adapted to receive the edge of a piece of leather to be operated upon. This burnishing wheel 27 is 'mounted at in burnishing device or tool is act- 7 The presser 19 r of a piece of leather occupying a position between the feed-wheel and the presser will enter the said groove.

The burnishing wheel 27 is mounted upon a spindle 29. This spindle is mounted witha sleeve 30 in which it rotates, the spindle and sleeve being pinned together by means of a pin 31 passing through both thereof. The sleeve 31 is fitted within a bearing 32 in connection with the top of the base '1, and is adapted to rotate within such bearing as well as move through the same in the direction of the length of the spindle and. sleeve The burnishing wheel is fixed upon the spindle '29 at the upper 7 end of the sleeve 30, and upon the said sleeve above the bearing 32 is fixed a whirl or pulley 33 for use in rotating the sleeve 30, spindle 29, and burnishing wheel 27. 7

Rotary motion is communicated to the said parts by means of a driving band 34 passingpartly around thesaid whirl or pulley 33and also partly around pulleys 35 and 36upon'the shaft 17 to an actuating pulley, not shown. The pulley35 is loosely mounted uponathe shaft 17 and is simply adirection-changing idler-pulley. [The pulley 36 c is made fast. with the shaft 17 by means of a pin 37, so that by means ofthe bandBatand the :saidpulley 36. the shaft17 is rotated. Y

1 The .means throughiwhieh the burnishing device or tool is adjusted automatically under the control of the thickness of the piece oi leather being operated upon, so as. to

maintain. a constant relationship between the acting portion of the groove of the burnishing device or tool and the angle or corner'of the'edge of the leather at the upper face of the leather in the case of all variations in the thickness of the leather, comprises in 'the machine shown in the drawings the yoke 38 having its upper portion operatively combined with the presser 19 and its lower portion operatively combined with the burnishing device or tool. The

operative engagement of the upper portion of the-yoke with the presser is effected by means of a split socket 39'with which such portion is provided, the said split socket fitting'the presser-bar 21 above the top of r the sleeve 23, the split socket being providedwith screws 40, 40. by means of which theopposite sides of the split socket are contracted upon the presser-bar so as to bind tightly thereagainst. For the operative engagement between the lower portion of the yoke 38 and the burnishing device ortool the saidlower portion is'furnished with-a-sleeve or thimble 41 which fits upon the spindle 29 below the sleeve 30, and within which the spindle rotates. The lower end of the sleeve 30 rests upon the upper end of the sleeve or thimble ll. Through the connection of the yoke 38 with the presser-bar 21 the position of the yoke ver' tically is determined by that'of the presser. An upward movement of the presser will operate to move the yoke 38 upward, and a downward movement of the presser will be accompanied by a corresponding descent of the yoke. Through the engagement between the upper end of the sleeve or thimble ll and the lower end of the sleeve 30, the position vertically of the burnishing device or tool is determined by that of the yoke. Upward movement of the yoke in unison with a corresponding movement of the presser will be accompanied by an upward movement of the burnishing device or tool. Downward movement of the yoke in unison with a corresponding movement of the'presser will be accompanied by a downward movement of the hurnishing device or tool. Consequently the burnishing device or tool-will be caused to move in unisonwith thepressery and the positions of both will be controlled by the thickness of the piece of leather that is being operated upon.

Independent adjustment of the burnishing device or tool with respect to the feedwheel is provided for by making the guide sleeve 23 vertically adjustable in the head of the goose-neck, and by making the sleeve or thimble ll adjustable in connection with the lower portion ofthe yoke 38. The top end of the guide-sleeve 23 constitutes a stop upon which the upper portion of the yoke comes to rest in the descent of the presser and yoke when there is no material between the feed-wheel and presser. This limits the approach of the presser toward the feed-roll and also the descent oft-he yoke and burnishing device or tool. A further adjustment of the burnishing device or tool is provided for by forming the exterior of the sleeve or thimble 41 with a screw-thread, and fitting it to a screw -threaded hole through the lower portion of the yoke 88, a polygonal flange or head 1-2 being provided upon the sleeve or thimble for convenience in turning the same in making adjustment. By means of the adjustable sleeve or thimble 41 the burnishing device or tool may be adjusted relative to the yoke. The described adjusting devices enable the groove 28 to be placed in the proper working relations with the periphery of the feed-wheel 3.

It will be perceived that, the machine having been adjusted to locate the groove of the burnishing device or tool in the proper working relation with respect to thepe-- riphery of the feed-wheel 3, if a piece of leather is introduced between the feed-wheel and the' presser the thickness of the leather itself will operate through the presse'r and the automatic adjustment-means to maintain a constant relationship between the act ing portion of the groove and the upper angle or corner of the edge of the leather, regardless of variations in the thickness of the leather, so as thereby ,to secure the best results in smoothing and rounding the portion of the edge of theleather which is eX- posed to view when the leather is incorporated in a shoe, etc.

While I have been particular to describe fully the construction of the machine shown in'the drawings, and while the said machine embodies'useful and valuable features f invention to which I lay claim herein, it is to be understood that the broader phases of the invention as herein claimed are not restricted to embodiment in the precise construction thus shown;

What is claimed is 1. A leather-edge burnishing machine comprising a burnishing device or tool arranged to engage the edge of a piece of leather to round and smooth the said edge, and automatic adjustment-means which operates under the control of the thickness of i the said piece to maintain a constant relationship between the acting portion of the burnishing device or tool and the angle or per face of the leather in the case of variations in the thickness of the leather.

2. A leather-edge burnishing machine comprising a burnishing device or tool having a burnishing groove arranged to receive the edge of a piece of leather to round and smooth the said edge, and automatic adjustment-means which operates under the con-V trol of the thickness of said piece to maintain a constant relationship between the porcorner of the edge of the leather at the uption of the groove which acts upon the angle I or corner of the edge of the leather at the upper face of the leather, and the said angle or corner, in the case of variations in thickness of the leather.

3. A leather-edge burnishing machine comprising a feed-wheel, a presser, a burnishingdevice or tool arranged to engage the edge of a piece of leather held between said feed-wheel and presser. to round and smooth the said edge, and adjustment-means through which the position of the presser as determined by the thickness of the leather acts to maintain a constant relationship between the acting portion of the burn'ishing device or tool and the angle or corner of the the edge of the leather at the upper face of the leather in the case of variations in the said thickness. 7

' t. A leather-edge burnishing machine comprising a feednvheel, a presser, a burnishing device or tool having a burnishing groove arranged to receive the edge of a .Gopies'o! thll'patent may be obtained for through which the position of the presser as determined by thethickness of the .leather acts to maintain a constant relationship between the acting portion of the groove" and the angle or corner of the edge of the leather at the'upper face of the leather in the case of variations in the said thickness.

5. A. leather-edge burnishing machine comprising a rotating burnishing Wheel having a burnishing groove arranged to receive the edge of a piece of leather to round and smooth the said edge, an automatic adjustment-means which operatesunder the control of the thickness of said piece to maintain a constant relationship between the acting portion of the groove and the angle or corner of the edge of the leather at the upper face of the leather inthe case of variations in the thickness of the leather. j

6. A leather-edge burnishing machine comprising a feed-Wheel, a presser,- a rotating burnishing Wheel having a burnishing groove arranged to receive the edge of piece of leather to round and smooth the said edge, and automatic adjustment-means through Which the position of the presser as determined by the thickness of the leather acts to maintain a constant relationship between the action portion of the groove and the a-ngle'or corner of the edge of the leather at the upper face of the leather in the'case in the case of variations in the said thickr135 HESS.

In testimony WhereofI aliix my signature in presence of tWo Witnesses.

' VERTR-UDE P. BUCK.

Witnesses:

CHAS. F. RANDAL ELLEN 0. SPRING.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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