US813293A - Skin-stretching machine. - Google Patents

Description

PATBNTED FEB. 2o, 1906. A. A. HELLWIG.

SKIN STRETCHING MACHINE. APPLIOATION FILED MAY 2, 1905.

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No. 813,293. PATBNTED FEB. 20, 1906.

l A. A. HELLWIG.

SKIN STRETGHING MACHINE.

APPLICATION FILED MAY 2, 1905.

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APPLICATION FILED MAY 2, 1905.

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ALBERT ALBERTUS HELLVIG, OF G LOVERSVILLE, N E'W YORK.

SKIN-STRETCHING MACHINE.

Specification of Letters Patent.

Patented Feb. 20, 1906.

Application filed May 2.1905. Serial No. 258,491.

T0 @ZZ whom t may concern:

Be it known that I, ALBERT ALBERTUS HELLWIG, a citizen of the United States, residing at Gloversville, in the county of Fulton and State of New York, have invented a new and useful Improvement in Skin-Stretching Machines, of which the following is a specification.

This invention relates to an improvement in skin stretching and finishing machines, and has particular reference to machines for stretching and finishing skins used in the manufacture of gloves and the object is to produce a machine in which a mechanical arrangement may be provided for stretching and smoothing skins and to obviate the slow tedious process of stretching the skins by hand, as is now the practice.

Heretofore it has been necessary in stretching a skin to smooth and stretch it over the abrasion-cylinder by rubbing the hands over the skin as it passes through and between the abrasion-cylinder and guide-rollers. This operation is exceedingly slow and tedious and in consequence greatly adds to the expense of the skin preparatory to cutting it to the desired shapes. It is, therefore, afurther object of my invention to construct a machine to obviate these objections and also to provide an arrangement by which the pressure employed for stretching a skin may be evenly distributed and the skin stretched and smoothed in an even manner throughout its entire surface.

The invention further consists in certain details of construction and novelties of combination and arrangement of parts, as will be fully set forth in the following specification and pointed lout in the claims, reference being had to the drawings, in which- Figure 1 represents a perspective view of a machine constructed in accordance with my invention. Fig. 2 is a vertical sectional view of the same drawn on about the line 2 2 of Fig. 4. Fig. 3 is an end elevation, the driveshaft being in section and the drive-pulley shown in dotted lines. Fig. 4 is a sectional view drawn on about the line 4 4 of Fig. 2. Fig. 5 is a sectional view similar to Fig. 2 and showing the machine holding and stretching a skin, the skin being shown in dotted lines. Fig. 6 is a detail perspective view of the sliding table. Fig. 7 is a detail perspective view of the corrugated bar, and Fig. 8 is a dia.- grammatic view of the belts for stretching the skin laterally.

In constructing a machine in accordance with my invention I employ a suitable frame A, upon which is j ournaled a shaft B, carrying an abrasion-cylinder BQ which is of the ordinary construction of cylinders used in such work. The cylinder is operated by a pulley and belt B2.

Operating in connection with the abrasioncylinder is my improved automatic stretching and dressing devices, which comprise a sliding table C, whose forward end is recessed, as shown at C, and in which is journaled a pressure-roller C2, 'preferably made of rubber and having a metal core the ends of which provide journals which operate in and extend through the ends of the table, as shown at C3, the extreme ends extending through slotted rack bars or arms D2 of a stretching-frame proper, D. The upper ends of the rack-bars are connected by a cross-bar D', and a pin D3 projects from each end of the frame through the slots of the arms and form fulcrums by which the teeth d of the arms are thrown into engagement with pinions D, carried by a shaft D5, journaled in the frame, when the table is moved forwardly and the rubber roller C2 is moved into close proximity to the abrasion-cylinder.

The table C is provided near its ends with depending arms C4, having stud bolts or pins C, over which fit the slotted ends of cranklevers C, journaled upon the inner sides of the frame, and to the opposite ends of the levers are connected links C7, whose opposite ends are connected to a foot-treadle C8, as shown.

Arranged in the frame and directly in front of the abrasion-cylinder is a bar E, whose front face is corrugated, the said corrugations being arranged upon an angle and in diverging directions from the center of the bar, and operating with this corrugated bar is an angle pressure-plate F, carried by the table and adjacent the roller C2, the horizontal portion of the plate being positioned to slide over the bar E into engagement with the cylinder B and the vertical portion being positioned to abut against the corrugated face of the bar when the table is moved forwardly. This angle-plate may be made in sections and the horizontal portion made adjustable to cause it to overlap the top of the bar E to a greater or less extent as the thickness and other conditions of the skin may require.

Immediately below the angle-plate and in IOO IIO

l the forward movement of the table,

line with the vertical portion thereof is a pressure-plate G, which extends entirely across the frame and has its ends connected to the front edges of the arm C4 of the table. This plate is designed for pressing a skin against two oppositely moving smoothing and stretching belts H and H', arranged directly under the corrugated bar E and in line with the front face of the bar, and these belts are mounted upon pulleys H3, journaled in brackets H5, fastened to the frame A, and also upon pulleys H4, fixed to the upper ends of two vertical shafts I, suitably journaled within the frame. The shaft for operating the belt H' carries a bevel-gear J, which is meshed by a bevel-gear J', fixed upon the end of a shaft J2, journaled in the frame at right angles to the shafts I. The opposite end of the shaft J 2 carries a pinion J3, meshed by an idler K, which in turn is driven by a gear L, arranged upon the shaft D5 and preferably fastened to or integral with the pinion D4, arranged upon the same end of the shaft. The drive-pinion M meshes the gear L and is carried by a driveshaft M', journaled in the frame and upon which is held a belt-pulley M3.

To impart motion to the belt H, I provide the shafts I with intermeshing pinions I', and it is obvious that when the shaft I for operatin the belt H' is set in motion movement wi l be imparted to the belt H, which will be driven in the opposite direction to the movement of the belt H', as shown by the arrows in Figs. 4 and 8 of the drawings.

In order to draw the table back to its initial position and to hold it there until forcibly moved forward by the foot-treadle, I employ springs S, which are connected to the table and also to lugs projecting from the frame. Suitable gages T are also provided to limit and, as shown in the drawings, these gages consist of set-screws working through lugs on the frame, so that their forward ends will be arranged to engage the front edges of the table and limit the forward movement thereof. This feature has been found necessary, as it prevents the several contacting faces of the machine being forced so tightly together that the skin would be torn or otherwise injured, and, furthermore, it avoids extreme care on the part of the operator, and thus allows him to work much faster than if he should be required to exercise extreme caution in operating the machine. The set-screws are of course capable of adjustment so that greater or less pressure may be obtained upon the skin as the conditions of the skin may necessitate.

The operation of my machine is as follows: The machine is set in motion with the table at its farthest position from the abrasion-cylinder and with the cross-bar of the stretching-frame lying thereon and the depending rack-arms out of engagement with the pinions D4. A hide or skin is then placed over the cross-bar so that a greater portion thereof, or a little more than one-half of the length, will hang down in the mac 'ne between the pressing-plate and the oppositely-moving belts, the operator in the meantime tightly holding the upper end of the skin against the cross-bar D. Then by pressing upon the foot-treadle the table will be moved forwardly, through the medium of the links and crank-levers, until the skin is thrown into contact with the abrasion-cylinder, where it is tightly pressed thereagainst by the hori- Zontal portion of the angle-plate and the rubber roller C2. During this operation the skin will also be bent over the corrugated face and upper edge of the bar E by the angleplate and also against the oppositely-moving belts by the pressing-plate. G, and when the parts are in this position the rack-arms of the stretching-frame will be in engagement with the pinions D4, and being continuously operated the frame will be forced upwardly, dragging or pulling the skin between the plate and belts, the angle-plate and corrugated bar, and also between the edge of the angle-plate and abrasion-cylinder and the rubber roller and abrasion-cylinder. The cylinder in the meantime operates upon the skin against the direction in which it is being drawn through the machine, and it will be readily understood that during this operation the skin is first operated upon by the belts to stretch itlaterally, and then by the angle-plate and corrugated bar and cylinder to remove all projections or foreign particles of the skin,

and finally by the frame which stretches the skin as it draws it through the machine. By arranging the corrugations of the bar in opposite diverging directions from the center, foreign substances will be smoothly and evenly removed from the skin by a shearing cut. After this operation the skin is reversed andthe operation repeated upon the opposite end thereof in exactly the same manner as heretofore described, it being understood, of course, that when the skin is drawn entirely through the machine the operator releases the pressure upon'the treadle, and the table is drawn back away from the abrasion-cylinder by the springs, when the rack-arm will be disengaged from the pinions and the frame allowed to drop to its initial position.

It will thus be seen that I provide an exceedingly cheap, simple, and highly-efficient machine for the purposes stated, and further comments upon its merits are thought unnecessary. I may say, however, that various slight changes and alterations may be made in the construction of the machine without departing from the broad principles thereof, and I claim the privilege of making such slight alterations as may be found necessary. It may be stated, however, that in practice the entire machine except the top immedi-l IOO 2. In a machine of the kind described, the

combination with a cylinder, of oppositelymoving belts, a sliding table, a pressure-roller and a pressure-plate carried by the table and adapted for cooperation with the roller and belts respectively, and a stretchingframe connected to and adapted to be thrown into operation by the table, all substantially as specified.

3. In a machine of the kind described, the combination with an abrasion-cylinder, of oppositely-moving stretching-belts, a stretching frame, and means for operating the frame.

4. In a machine of the kind described, the combination with an abrasion-cylinderand a pressure-roller, of a stretching-frame for drawing a skin through the abrasion-cylinder and roller against the rotation of the said cylinder, oppositely-moving belts, and a pressure-plate for holding a skin against the belts.

5. In a machine of the kind described, the combination with an abrasion-cylinder, of a stretching-frame, means for operating the frame, a sliding table operatively connected to the frame for throwing the said frame into engagement with the operating means.

6. In a machine of the kind described, the combination with an abrasion-cylinder, of a stretching-frame, oppositely-moving belts, a sliding table carrying a pressure roller and plate, and operatively connected with the stretching-frame.

7. In a machine of the kind described, the combination with an abrasioncylinder, of a stretchingframe, means for operating the frame, of a sliding table connected with the frame and adapted for moving the latter into engagement with the operating means, a pressure roller and plate carried by the table, oppositely-moving belts, means for operating the belts, and means for operating the table, substantially as specified.

8. In a machine of the kind described, the combination with an abrasion-cylinder, of a stretching-frame, a sliding table connected to the frame, oppositely-moving belts, a corrugated bar arranged above the belts, a pressure roller and plate carried by the sliding table for operation with the abrasion-cylinder and belts respectively, and an angle-plate for operation with the corrugated bar.

9. In a machine of the kind described, the

combination with an abrasion-cylinder, of a stretching-frame, comprising the slotted-rackarms and a cross-bar, a sliding table having a pressure-roller journaled therein, the shaft of said roller extending through the slots in the rack-arms, gears for engagement with the rack-arms, and by which the frame is operated when the table is moved toward the abrasion-cylinder, and means for operating the table.

l0. In a machine of the kind described, the combination with a frame, having an abrasion-cylinder mounted thereon, of a stretching-frame, said frame comprising the slotted rackarms, and cross-bar connecting the arms, a sliding table connected to the stretching-frame, a shaft having pinions for engagement with the rack-arms when the table is moved toward the abrasion-cylinder, oppositely moving belts operating within the frame, a corrugated bar arranged within the frame, a pressure roller and plate carried by the table and adapted for operation with the abrasion-cylinder and belts respectively, an angle-plate carried by the table for operation with the corrugated bar, an intermeshing gear and pinions for operating the belts, and a drive-pinion for operating the gear.

11. In a machine of the kind described, the combination with a frame, of an abrasioncylinder journaled thereon, a sliding table operating upon the frame, a pressure-roller journaled .in the forward end of the table, a stretching-frame movably positioned upon the frame and connected with the sliding table, a corrugated bar arranged within the frame, adjacent the abrasion-cylinder, oppositely-moving belts arranged within the frame and directly below the corrugated bar, an angle-plate and pressure-plate carried IOO by the table, a treadle for operating the table, and means for operating the stretching frame and belt respectively.

12. In a machine of the kind described, the combination with a frame, of an abrasioncylinder journaled thereon, a sliding table operating upon the frame, a pressure-roller journaled in the end of the table, the shaft of the roller projecting beyond the edge of the table, a stretching-frame having slotted rack-arms through which the ends of the shaft of the pressure-roller project, a shaft journaled in the frame, and having pinions for engagement with the slotted rack-arms of the stretching-frame, shafts vertically journaled in the frame and having pulleys at their upper ends, pulleys journaled to the sides of the frame, belts operating upon the pulleys, a short shaft ournaled in the frame and having a beveled pinion for engagement with a beveled pinion carried by one of the vertically-journaled shafts, an intermeshing gear and pinions for imparting motion to the short shaft, intermeshing pinions carried by the vertical shafts, and an angle and pressure IIO plate carried by the sliding table, all substantially for the purposes set forth.

13. In a machine of the kind described, the combination with an abrasion-cylinder, of oppositely-moving stretching-belts, astretching-frame, means for operating the frame, and an operating-table connected to the said frame and adapted to move the frame into and out of engagement with the said operating means.

14. In a skin-stretching machine, the combination with an abrasion-cylinder, of oppositely-moving belts, a sliding table, means carried by the table for holdingl a skin into engagement with the cylinder, and belts, and also means for drawing the skin through the machine. I

15. In a skin-stretching machine, the combination with an abrasionecylinder, of oppositely-moving belts, a corrugated bar arranged adjacent the cylinder, a sliding table carrying a pressure-roller and pressure-plates, which are adapted for pressing a skin into engagement with the cylinder, belts, and bar, and means for drawing the skin through the machine.

16. In a machine of the kind described, the combination with an abrasion-cylinder, of oppositely-moving belts, a bar arranged adjacent the cylinder, a sliding table carrying a pressure-roller, an adjustable plate, and stationary plates connected to the table, means for operating the table, and also means for operating the frame when the table is moved forwardly.

17. In a machine of the-kind described, the combination with a frame, of an abrasion-cylinder, oppositely-moving belts, a corrugated bar, a sliding table carrying a pressure-roller and pressure plates, a movable stretcherframe, and means for operating the frame said frame being connected to the table and adapted to be thrown into engagement with the said operating means.

18. In a machine of the kind described, the combination with a frame, of an abrasion-cyl inder journaled in the frame, stretchingbelts, a sliding table, a stretcher-frame connected to the table, and continuously-operating means adapted for engagement by the frame when the table is moved forwardly and disengaged when the table is moved rearwardly, as specified.

19. In a machine of the kind described, the combination with a frame, of an abrasionecylinder journaled therein, continuously-operating stretching-belts, a sliding table, a continuously-operating shaft journaled in the frame, and having pinious fastened thereto, and a stretcher-frame held upon the frame of the machine and connected to the said table, said frame having rack-sections which are adapted for engagement with the pinions when the table is moved forwardly and disengaged when the position of the table is reversed.

20. In a machine of the kind described, the combination with an abrasion-cylinder, of oppositely-moving belts, a corrugated bar, a sliding table carrying a pressure-roller, a hori- Zontally-disposed adjustable pressure-plate connected to the table, vertically-disposed stationary plates connected to the table, and a stretcher-frame connected to and adapted to be thrown into operative position by the table.

ALBERT AIIBERTUS HEIIIIWIG.

Witnesses:

WILLIAM CARR, WILLIAM HELLWIG.

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