US1557186A - Leather-graining machine - Google Patents

Description

G. S. NEELEY LEATHER GRAI N ING MACK-l1 NE fizzle/dof Patented Get. 13, 1925.

UNITED STATES PATENT OFFICE.

GEORGE s. NEELEY, or woon RIVER, ILLINOIS, AssIGNoR or ONE-HALF To GRIFFIN WATKINS, or ALToN, ILLINOIS. Y

LEATHER-GRAINING- MACHINE.

Application led January 7, 1925. Serial No. 1,061.

To all z/zo'nt I? may concern.'

Be it known that I, GEORGE S. Nun-Lui?, a citizen of the'United States, residingat Wood River, Illinois, have invented a certain new and useful lmprovement in Leather-Graining Machines, of which the following is a specification, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in leather graining machines and the objects of the invention are to provide a machine wherein the presser` roller or drum utilized for operating upon the leather is maintained at all Vtimes in proper operative position, thereby preventingr slippage lor overrunning of said drum and eliminating loss of time and labor caused by the drum getting out of step with the cycle of operation of the machine.

Further objects of the invention are to provide a simple and eiiicient auxiliary brake Vfor the drum, which brake automatically retards the rotative movement ofsaid drum when thelatter is operating` free from the frictional engagement with the table or the leather Stock.

Still further objects of the invention are to provide a leather operating presser roller and a revoluble member for imparting rotary movement thereto, Said revoluble mem- .ber carrying a brake designed to exert braking action upon said drum for preventing the overrunning thereof past its starting point.

With these and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompany- .ing drawings, in which- A y Y' 4 Figure l is a side elevational view 'of the machine.

Figure .2 is a vertical crosssection taken on lines .2-2 ofFigurefl.l y

Figure 3 is an elevational view of the mechanism utilized for imparting .rotary V.movement to the presser roller Iand showing it atfthe beginningof `the' operating or rearward stroke. y Y

v Figure 4 is a similar view showing the parts in position at the end of the operating stroke. y

Figure 5 is a transverse crosssection `of the rum vor, presser roller and showing the same at the beginning' of the operating Stroke, with the rotating mechanism occupying the position shown in Figure 3.

Figure G is an enlarged cross section of the drum showing the same in position at the end of the operating stroke and corresponding to Figure 4.

Figure 7 is a detail elevational view of the auxiliary brake.

Figure 8 is a cross section taken on line 8-8 of Figure 7.

The leather graining machine to which the present invention is directed is used to produce, artificially, grain in the leather. Thisis accomplished by placing the leather on the table of the machine with a portion of said leather folded over as shown in Figure 5. A presser drum or roller is movable in a horizontal plane above the table and engages, when Said table .is raised, the folded portion of the leather and in traveling above said table creases said leather and produces therein the grain effect.

A number of operations is required for each piece of leather and after each operation the position of the leather is changed so as to present a different portion thereof to the operative action of the roller or drum. The druln'is preferably Semi-cylindrical in shape as only one-half of the peripheral surface of the roller is utilized to roll out the leather, this being done during the rearward movement'of the drum. During the forward or return movement of the drum, the table occupies avlowered position and the operator rearranges the leather on the table in readiness for the next rearwardA or rolling action ofthe drum. While the drum is being restored to its starting position, it isout of frictional contact with the table and `consequently there is nol restraint upon the drum so that the latter, due to the momentum, isapt to run past its startingv position fSo that at the next operatingmovement of the'roller,.the latter instead of Yengaging the leather at its starting point may bel .brought 4into engagement with the leather `at a point located from one-quarter to one-half of the operating surface `of the drum. Thus it Vhappens that the entire surface of the drum is notutilized in rolling out the leather and inasmuch-as vthe roller has to complete its vrearvvard `movement before it can be broi'ifttogits starting position, thsamlachine is? operating vMilf l Vidle during the last half of the operating stroke. Such a condition is objectionable because it requires a greater number of operations to finish a given piece of leather and the efficiency of the machine is impaired due to the loss of time and labor caused by the improper positioning of the drum.

To obviate these objectional features and insure accurate operating alignment of the drum, I provide an auxiliary brake carried by one of the gears used to impart rotary motion to the drum, said brake being in frictional engagement with the annular face of a disk which is conjoined to the drum .so that said drum is not free to rotate under the inuence of momentum but is held at all times under restraint due to the frictional engagement of the brake. with said disk.

Referring by numerals to the accompanying drawings, 1() indicates a framework in the rear end of which is supported in suitable bearings a shaft 11 driven in any suitable manner and having fixed thereon drive wheels 12 which are disposed on each side of framework 10. Pivotally connected to each drive wheel is one end of a connecting rod 14, the opposite end of which is pivotally carried by one end of a shaft 15 which extends between the side frames of framework 10 and is provided with rollers 1G which operate in horizontally disposed guideways 17 of framework 10. v

A drum or presser roller 18, preferably semicylindrical in cross section, is fixed on shaft 15 intermediate the sides of framework 10 and the convex face of member 18 is preferably lined with a rubber plate 18a. A table 19 is disposed below and normally spaced from drum 18 and is adapted to be raised and brought into frictional engagement with the drum by means of a pedal 20. This pedal is carried by levers 21 which yare connected by links 22 to the inner ends of levers 24 fulcrumed at 25 and having their outer ends connected by links 26 to table 19.

In the operation of the machine, the leather is placed on table 19 and one portion of said leather is folded over with the crease thereof arranged near the starting point of the drum. The table is then raised so as to` bring the leather in engagement with the cylindrical peripheral surface of drum 18. Under proper operating conditions, the point of contact of the drum with the leather' should be just at the beginning of the convex face portion of the drum as shown in Figure 5.

In order to rotate the drum against the line of travel and against the folded portionv of Vthe leather so that .the latter is pressed and gradually unfolded on the table as the drum travels rearwardly, stationary racks 27 and 28 are provided in the sides of framework 10 and gears 29 and 30 meshing with said racks are loosely arranged on shaft 15 adjacent to guideways 17. Each gear carries a pawl 31 which is adapted to engage a notch 32 formed in the peripheral face of a disk 34 fixed to shaft 15 adjacent to each gear 29 and 30. Pawls 31 are .so disposed relative to disks 34 that the pawl of one gear is adapted to engage the corresponding disk and interlock said gear and the drum whereby the latter is rotated in one direction by virtue of the interengagement of said gear with the corresponding rack and the pawl of the other gear is adapted to engage the corresponding disk and establish rotative connection between that gear and the drum when said drum is traveling in an opposite direction.

1t has been found in practice that during` the return movement of the drum when the latter is free and out of frictional engagement with the table, said drum due to the momentum will run past its starting point so that during the next operating movement of thev drum, the latter will get out of step with theV cycle of operation and will move out of engagement with the leather and the table before the. completion of the rearward. or operative .stroke of the machine.

In order to eliminate the troublesome features and preserve true and accurate operative relation between the drum and the rest of the mechanism, I provide an auXiliary brake mounted on that gear which is interlocked with the drum during the return movement thereof so that said drum is held under restraintby said brake and will not overrun its starting point. This brake consists of a segmental member or shoe 35, the inner face of which is provided with a brake lining 36 adapted to engage the annular face of one of the disks 34. Shoe 35 is provided with ears 37 in which are seated the ends of rods 38. These rods pass through lugs 39 which are fixed and project laterally from spokes of gear 29. A spring 40 is arranged on each rod 38 and one end thereof presses against lug 39 while its opposite end bears against a nut 41 which is .screw-seated on the free end of rod 38. Nut. 41 can be adjusted to regulate the tension of the spring and increase or decrease the force with which brake 35 is applied to disk 34. A lock nut 42 is provided to hold nut 41 against displacement. A nut 44 is arranged on each rod 38 between ear 37 and lug 39 and forms a stop for limiting the inward movement of brake 35. A nut 45 is used to lock nut 44 in position.

The tension of springs 40 is such that the brake 35 is held to disk 34 with sufficient pressure to prevent free movement of the drum but without impeding the operativeness thereof. As the brake is mounted on oneof the gears'which is loosely arranged fgaeemse on the shaft of the drum, said brake travels with the drum and holds the latter under restraint and is at all times in proper operative relation therewith.

l claim:

l. A leather graining machine comprising in combination a revoluble presser roller, means for moving said roller in a horizontal plane7 and braking means movable with said roller and exerting braking' action on said roller tor preventing free rotary movement thereof.

2. A leather graining machine comprising in combination a. revoluble presser drum, means for moving said drum in a horizontal plane7 a disk in fixed relation to said drum, and a brake movable in unison With said drum and engaging said disk for counteraeting the momentum of said roller and retarding the rotary movement thereof.

3. A leather graining machine comprising in combination a presser roller, means for moving said roller in a horizontal plane, a disk lixed to each end of said roller, means for imparting revoluble motion to said roller in predetermined relation to its line of movenient in a horizontal plane, and a brake carried by said revoluble means and engaging one of said disks for exerting rictional pressure against said roller during the return stroke thereof.

Ll. A leather graining machine comprising in combination a presser roller movable in a horizontal plane, a notched disk in fixed relation with veach end ol said roller, a stationary rack arranged adjacent to each end of said roller, a gear loosely mounted adj a* cent to each disk and revoluble through its engagement with the corresponding rack, a paivl carried by each gear adapted to engage the corresponding disk and interlock the latter with its gear in one direction, and a brake carried by one of said gears and frietionally engaging a corresponding disk for exerting braking action against said roller and maintaining it in proper' operative relation.

ln a leather graining machine, the combination with a presser roller, revolubly mounted and movable in a horizontal plane and a disk conjoined to said roller, of a brake movable in a plane with said roller and frictionally engaging said disk for eliminating free revoluble movement of said roller. l

6. In a leather graining machine, the combination with a revoluble presser roller movable in a horizontal plane and a disk con joined to said presser roller, of a member movable in correlation With said roller, and a brake carried by said member and yieldingly engaging said disk for restraining the rotary movement of said roller and maintaining it in proper operative relation.

In testimony whereof I hereunto ax my signature this 27th day of Deo., 1924.

GEORGE S. NEELEY.

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