US2538159A - Leather compacting machine using work surface conforming anvils - Google Patents

Description

Jan. 16, 1951 M. MAESER ET AL LEATHER COMPACTING MACHINE USING WORK SURFACE CONFORMING ANVILS Filed Feb. 24, 1950 nwen fors Miezh Maeser- Richard WDanieZs, J7".

Patented Jan. 16, 1951 LEATHER GOMPAGTING MACHINE USING WORK SURFACE CONFORMING ANVILS Mieth Maescr, Beverly, and Richard W. Daniels, Jr., Salem, Mass, assignors to United Shoe Machinery Corporation, Flcmington, N. J., a corporation of New Jersey Application February 24, 1950, Serial No. 146,056

9 Claims. (01. 69--1) This invention relates to machines for compressing and setting leather, and more partic-.

ularly to leather compacting machines with an improved anvil structure, this type of machine being disclosed in the application for Letters Patent of the United States Serial No. 112,446, filed August 26, 1949, in the names of John J. Maciejowski and Richard W. Daniels, Jr.

The machine disclosed in the above-referredto application Serial No. 112,446 is capable of performing excellent work and producing satisfactory sole leather. The heavy leather worked upon is fed or guided through the machine by means of suitable infeed and discharge rollers and with the grain side down. Two spaced rows of reciprocating members are located beneath the path of the work. Each row is preferably joined by a horizontal flat bar (hereincalled a compacting member) adapted to act on the grain side of the work and anvils are placed in cooperative positions to back up the flesh side of the work. In using such a machine it has been found that with some hides the action of the machine on the leather does not produce as uniform and smooth results as would be desirable. Some hides are more irregular than others in thickness and/or density but whatever the reason may be definite marks or variable effects are often formed in the work by the machine and these marks or effects are clearly apparent on both sides of the leather. Such marks or apparent variations in effective treatment of the work are objectionable in so far as the appearance of the products is concerned when such products are intended to be of fine quality.

It is an object of this invention to provide a machine in which the above-referred-to difiiculties are avoided and which is capable of improving the quality of work performed as judged by experienced tanners.

A complete machine is disclosed in the application Serial No. 112,446 and as the present inven tion relates to the anvil means or structure with.- out any modification of the other parts of the machine being essential, the present specification and drawings are specifically directed to the anvil structure and only'such adjacent machine parts as are essential for a clear understanding of the invention. In the use of the present invention the situation is similar to that pertaining to the machine of the application Serial No.

112,446 in that either the anvils or the compacting members may be considered as the backing members for it is obvious with the type of machine disclosed that the work must be squeezed or compacted from both sides and that either the anvils or the compacting members or both may be yieldable.

A feature of the present invention and as embodied in the machine illustrated is a multiple or sectional anvil construction in which interengaging continguous anvils or anvil sections present opposing side faces which are transverse to the path or direction of feed in which a work piece is to be conveyed through the machine. This is the equivalent of providing a continuity of work impacting surface extending along the anvil sections and transverse to the path of feed of the work. Another feature of the invention is an arrangement of contiguous anvils in a machine in one or more rows, each anvil having a work impact portion arranged to pivot about an axis which is parallel with the path in which a work piece may be passed through the machine and thereby tilts and accommodates itself to the varying thickness of the work. Still another feature is a pivoted or work thickness conforming anvil means or member which is yieldingly mounted or spring loaded for compacting leather, the means or member being arranged for cooperation with a reciprocating or work compacting member.

The important aspects of the invention will now be described in detail in the specification and then pointed out more particularly in the claims.

In the drawings,

Fig. 1 is a sectional view taken along the line of feed and through that portion of a leather .compacting machine in which the present invention is embodied;

Fig. 2 is an elevational view of parts shown in. Fig. 1 with a sectional View along the line 11-11 of Fig. 1' through one anvil and drawn on an enlarged scale;

Fig. 3 is a bottom view of a partial row of anvils showing the preferred form of anvil construction, .as depicted in Figs. 1 and 2; and

Fig. 4 is an elevational view of one anvil drawn on an enlarged scale and illustrating the tilting or pivoting action of the anvil.

The illustrated machine is substantially the same as that disclosed in application Serial No. 112,446 in that two feed rolls l0 and I2 are utilized at the front of the machine to feed a work piece W in a horizontal plane and to the bite of two discharge rolls (not shown). A top guide plate l4 and bottom plates l6, l8 and 29 are arranged to guide the work piece W through a work treating zone. The frame 22 of the'machine includes a top casting 24 which extends transversely across the machine and to which is attached two anvil retaining castings 26 and 28. Above the casting 26, the casting 24 supports a row of threaded pins 36 and above the casting 28 it retains a row of threaded pins 32. The pins 3 are in staggered relation with respect to the pins 32 and as viewed in the direc tion of feed. The machine frame 22 also carries a lower main casting 38 in which two rows of reciprocating members 40 are driven by power means (not shown). One row is directly beneath the pins 30 and is joined by a horizontal flat bar or work compactor M. The other row is joined by a compactor 42 (Fig. 1) arranged beneath the pins 32. The castings 2'6 and 28 are bored to receive cylindrical sleeve inserts 43 over which are retained strips 44 of resilient shock absorbing material such as rubber or neoprene impregnated fabric. The lower ends of the pins 30, 32 are provided with reduced end portions 46. The structure thus far described is substantially the same as that shown in ap plication Serial No. 112,446.

The present invention is concerned with an improved anvil structure and the castings 26 and 28 are provided with special anvils the upper portions of which are flanged and these flanges are rectangular in shape and their abutting sides are shown in Fig. 2. These flanges rest upon the shock absorbing strips 44. Each anvil 50 includes a depending cylindrical sleeve 52 which is in slidable relation with a cylindrical sleeve insert 43. Opposite portions of each of the sleeves 52 are cut away for a short distance above the bottom ends of the corresponding sleeve insert 43, as seen in Fig. 2. The remaining portions of each of the sleeves 52 extend a greater distance downwardy and in these portions is journaled a pin '68. Pivoted on the pins iii] are anvil blocks 62 and springs 64 bear down upon these blocks from the pins 30 or 32 by means of which the spring compression or loading may be adjusted. The blocks 62 are parts of the work compacting members and each block is preferably T-shaped in so far as its work contacting surface is concerned as shown in Fig. 3 and is provided with an arc of curvature on its under side which is tangential to and reciprocable in the path of movement of the work being fed through the machine. It will be noted that the pins 60 are parallel to the direction of feed of the work and that these pins cannot be displaced from their positions in that respect be-- cause the flanges 52 are rectangular and are in abutting relation as above stated.

Fig. 3 shows a plurality of anvils in their preferred form so far as their work impacting surfaces are concerned. It will be noted that the opposed side faces and 72 of contiguous anvils are transverse or normal to the direction of feed of the work. These faces may be obliquely positioned if desired, the essential factor being that these faces (where they intersect the main sur-- faces of contact with the work) do not oppose each other in such a way as to be parallel to the line of feed and thereby make lines in the leather. The interlocking of the blocks 52 or the work impacting surfaces as illustrated in Fig. 3 eliminates any possible objectionable lines 01' localized indentations which would otherwise be produced in the leather by virtue of the partition of the anvil means into a number of separate anvils.

1 Fig. 4 shows an extreme tilted position of an anvil 62, but it will be appreciated that such an angle is likely to be assumed only at the edge of a work piece. Surfaces or shoulders 14 (Fig. 4) constitute stop means limiting the tilting angle. The effect of tilting the blocks 62 or the work impacting surfaces about the pins 60 is to make the compacting of the leather more uniform despite the customary variations of the leather in thickness or density. Adequate clearance is maintained between the tilting blocks so that theshoulders l4 and not the adjacent blocks are adapted to serve as the stop means.

Sole leather has been compacted with excellent results in a machine using the features of the present invention and both the grain surface and the flesh side of each work piece exhibit no objectionable marks which may be said to be effected by the pounding or compressive action to which the leather is subjected by the machine.

Having described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for compacting leather, a frame, means for feeding a work piece through the machine in a given path, work compacting members on one side of said path, contiguous anvils on the other side of said path, the said members and anvils being arranged on said frame to cooperate and compact leather in said path, and said anvils presenting opposed side faces which are transverse to the direction of feed of the work piece.

2. In a machine for compacting hides, a frame,

' reciprocable work compacting members and cooperative anvils mounted in opposed positions in said frame, means for feeding a work piece in a path leading between said members and said anvils, and said anvils presenting opposed side faces which are transverse to the direction of feed of the work piece.

3. In a machine for compacting hides, a frame, reciprocable work compacting members and interengaging contiguous anvils mounted in said frame in cooperative relation, means for guiding a work piece in a path leading between said members and said anvils, and each of said anvils having a T-shaped work impacting surface.

4. In a machine for compacting hides, a frame, a reciprocable work compacting member and cooperative anvil means on said frame, said anvil means being yieldably mounted and in alinement with said compacting member, means for guiding a work piece in a path leading between said member and said anvil means, and the work impacting surface of said anvil being movable to accommodate itself t the thickness of said work piece.

5. In a machine for compacting hides, a frame, reciprocable work compacting members and c0- operative anvils mounted on said frame, means for guiding a work piece through said machine in a path leading between said members and said anvils, and the work impacting portions of each anvil being pivotally mounted.

6. In a machine for compacting hides, a frame, means for feeding and guiding a work piece in a path leading through the machine, power driven reciprocable work compacting members mounted on said frame on one side of said path, contiguous anvils mounted on the other side of said path and in cooperative relation with said compacting members, the said anvils being spring loaded and each anvil having a work impacting portion which is ivoted about an axis parallel to said path and which is T-shaped with an arc of curvature tangential to said path.

7. In a machine for compacting leatherfa frame, means for guiding a work piece in a path through the machine, reciprocable work compacting members mounted on said frame and on one side f said path, anvil means arranged on the other side of said path and in cooperative relation with said compacting members and comprising a plurality of yielding sections presenting a continuity of work impacting surface extending along said sections and transverse to said path.

8. In a machine for compacting leather, a

frame, reciprocable work compacting members in 15 said frame, anvil means arranged to cooperate with said members and compact work passed between said means and said members, said anvil means comprising a plurality of sections adapted to tilt and move bodily, independent yieldable and adjustable holding means for each section, and those of said sections which are contiguous interengaging to present at least one anvil surface to all parts of said work.

9. In a machine for compacting leather, a frame, reciprocable work compacting members on said frame, and anvil means arranged to cooperate with said members comprising a plurality of interengaging and yielding sections having contiguous work impacting surfaces presentin no shoulders or projections to mark the work.

MIETH MAESER, RICHARD W. DANIELS, Ja.

No references cited.

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