US3854309A

US3854309A - Letting-out of hides and similar materials

Info

Publication number: US3854309A
Application number: US00328007A
Authority: US
Inventors: K Rabanus
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-01-31
Filing date: 1973-01-30
Publication date: 1974-12-17
Anticipated expiration: 1991-12-17
Also published as: DE2204399A1; IT977705B; JPS4885701A; GB1419988A; DD101698A5; JPS5248162B2; CA986328A; FR2170006B1; DE2204399B2; FR2170006A1

Abstract

A hide is let-out by being cut across its width along one line into two parts, the two parts then being longitudinally staggered and being stitched together. The process is repeated along lines staggered laterally in relation to the first cut line. During this process, the hide is held between a pair of holders movable in mutually perpendicular directions whereby to tension the hide for cutting and to stagger the cut parts prior to stitching.

Description

United States Patent [191 Rabanus [111 3,854,309 [4 1 Dec. 17, 1974 LETTING-OUT OF HIDES AND SIMILAR MATERIALS [76] Inventor: Kurt Rabanus, Grabenstrasse 22,

5608 Radevormwald, Germany 22 Filed: Jan. 30, 1973 21 App]. No.: 328,007

[30] Foreign Application Priority Data Jan. 31, i972 Germany 2204399 [52] US. Cl. 69/23 51 int. Cl ..Cl4b 1/40 [58] Field of Search 69/22, 23, 19 I [56] References Cited UNITED STATES PATENTS 2,573,292 l0/l95l Yost .L 69/22 X 3,611,964 l0/l97l Piampiano 69/22 X 3,748,212 7/1973 Piampiano et at; 69/22 x I FOREIGN PATENTS OR APPLICATIONS 569,485 l/l959 Canada 69/19 Primary Examiner-Alfred R. Guest Attorney, Agent, or FirmBucknam and Archer I 57] ABSTRACT A hide is let-out by being cut across its width along one line into two parts, the two parts then being longitudinally staggered and being stitched together. The process is repeated along lines staggered laterally inrelation to the first cut line. During this process, the hide is held between a pair of holders movable in mutually perpendicular directions whereby to tension the hide for cutting and to stagger the cut parts prior to stitching. I

7 Claims, 7 Drawing Figures PATENTEL- 3.854.309

SHEET 10F 4 Fig] PATEHTEG IKE 1 H974 SHEET 2 OF PATENTEU 05a 1 7x974 SHEET t UP 4 BACKGROUND OF THE INVENTION 7 1. Field of the Invention The invention relates to the letting-out of hides, skins, and other similar materials,hereinafterreferred to simply as hides."

2. Description of the Prior Art When letting-out hides, parts of the hides or hide areas are cut up and are reassembled in such a way that they are suitable for .further treatment in extended form.

In the fur trade,- the letting-out of hides is carried out mainly by hand with the aid of separate machines.

The hide in its natural state is first of all cut lengthwise by hand. i

The two hide halves arein this process cut into individual hide strips, starting from the leather side, partly,

by hand, partly by machine, so that the wool under the hide is injured'as little as possible. The angle of the cutting strips to the longitudinal direction may vary from hide to hide. Often, the necessary staggering from strip to strip has to be changed within one hide processing operation, so as to be able to give the hide a definite shape. 1

Each strip of hide is then staggered in relation to the adjacent strip and then the strips are stitched together with a sewing machine. This staggering of the hide strips in relation to one another produces a lengthening of the hide. The overlapping edge portions of adjacent strips are levelled after'the stitching of all thehide strips. As the under-wool and the points (awn) of the hide do not lie vertically to the leather, it is necessary during the' stitching process to rub the hidemanually vertically downwards, that is to say parallel with the leather'surfaces, so that the under-wool is not stitched together with the'hide. The stroking or rubbing of the wool can also be carried out in part with compressed air. a

After the two hide halves have been let out and levelled on the sides,the halves are again stitched together SUMMARY OF THE INVENTION According to' one aspect of the present invention,-

' the staggered parts of the hide.

The hide holders can be in the form of plates with the said opposed surfaces thereof being parallel.

Also, the said opposed surfaces of the hide holders can be undercut.

In the area of the opposed surfaces of the hide holders, the base plate preferably has a recess into which the hair of the hide can freely extend downwardly. By this means a simpler lying open of the hairis made possible, this being of significance for the subsequent operating processes.

The hide hair may be laid open purely mechanically p in such a way that a carriage with a needle-type point drives into the hair and lays the. hair apart in the manner of a partingso that the leather is exposed in'a longitudinal direction. Alternatively, the carriage can be provided with an air nozzle for 'this purpose.

Suitably a longitudinal recess is provided at the end of the needle-type point, wherebyby the parting lies'exthe hide out through is movably mounted on the guide I actly over the recess, so that the leather of the hide can rail parallel with the direction of cutting.

there is provided a process for letting-out hides comprising the steps of automatically dividing the hide with one cut only over the width of the hideinto two hide a is provided a device for letting-out hides comprising base plate means, at'least two hide holders, said holders justable distance and .being arranged onthe base plate having opposed surfaces and being mounted at an admeans, said holders being displaceable in relation to each other in mutually perpendicular directions, means for cutting a hide tensioned between the hide holders,

' of the device.

BRIEF DESCRIPTION oF rIIE DRAWINGS Embodiments of the invention will now be described, by way of example only, with reference to the accom- I panying diagrammatic drawings, in which:

FIGQI is a plan view of a device for letting-out hides;

FIG. 2 is a vertical section through a portion of the device of FIG. 1; V

FIG. 3 is a section similar to that of FIG. 2, and showing the arrangement during a hide-hair parting operation;

FIG. 4 is a section similar to that of FIG. 3 and showing the arrangement after the parting operation in which parting means, a guide rail, and the portion of the hide therebetween are raised and the hide holders of the device are moved towards each other;

FIG. '5 is a section similar to that of FIG. 4 in which the guide rail and the parting means have been moved respectively upwardly and downwardly away from the hide, and the

hide holders

2 and 3 are shifted towards each other in such a way that they grip the cutting line of adjoining hide ends for the stitching process;

FIG. '6 is a plan view of another embodiment of a device in accordance with the invention, in which the two hide halves made by one cut are simultaneously worked side-by-side at the same time; and

H6. 7 is a perspective view of-a {further embodiment I DESCRIPTION OF THE PREFERRED EMBODIMENTS According to FIGS.'1 and 2, thehide lies with its nonhairy leather side between

hide holder plates

2, 3 and is clamped against a base plate with a relatively low force. As shown in FIG. 2 the orientation of the hide hair is undisturbed in a part thereof which lies within a recess 5 inside the base plate 4. The working process starts in this part. A carriage 9 having a needle-like tip moves beneath a guide rail 6 in the direction of a longitudinal slit 7 in the rail 6'and parts of lays open the hide hairs crestwise (crownwis'e) away from one another over the entire breadth of the hide. As shown in FIG.

3 there is at the upper end of the carriage 9 a longitudinal recess 8 which lies beneath the parted section of the -hair. After the hide has been made ready in this way for a cutting process, thehide fixed between the guide rail 6 and the carriage 9 (as shown in FIG. 4) is fed upwardly; at the same time, the opposed side edges l5, 16

of the

hide holders plates

2, 3 move towards each other and press the hide against the carriage 9. A rotary blade 14 of a cutter 12 is lowered onto the hide through the i The hide holders can alternatively be constructed in the form of hide holding members provided with needles, in particular in the form of rollers provided with needles; with this latter construction accurate holding of the hide portions and a simple hide feed is provided.

The hide is fed through the-device in such a way that i the hide is fed from theunprocessed portion of the hide In the devices described the sewing machine for stitching together of the separated hide is preferably moved along the stationary hide. The sewing machine slit 7 in the guide rail 6 anddivides the hide in the longitudinal direction of the slit 7, the cutter 12 moving along a guide rail 13 parallel to the guide rail 6. After hide holder plate 2is moved against the hide holder plate 3 in the x direction (FIG. 1) whereby the holder plates are offset or staggered. This staggering movement is followed exactly by the hide portions which lie against the

hide holder plates

2, 3, since the friction coefficient ofthe combination leather-material of the hide holder plates can be made very high. After the two hide portions have been stitched together the

hide holder plates

2, 3 move away from each other, until the processed hide again lies along the x-axis. The hide holder plate 3 is then released to permit movement of the hide by displacing the hide holder plate 2 in the xdirection.-When the

hide holder plates

2, 3 are again in their initial-position, the process is repeated.

The device shown in FIG. 6 is so constructed that two hide parts 17 .and 17 formed in the first instance by one cut can be worked at the same time alongside each other. For the purpose two pairs of hide holders 18, 19,

19 are provided and are moved through ajoint guiding and driving device. In this case, one hide holder 18 is common to each pair and is movable only perpendicularly to the direction of movement of the carriage, i.e.

the holder 18 is movable only in the y-direction. The other hide holders l9 and 1.9 ofthe two pairs are, on'

plates, provision is preferably made for a recess in the plate under which the processed hide is located, to permit horizontal positioning of the processed hide portion.

can, as already mentioned in connection with the device of FIG. 6, be moved stepwise by a step-by-step motor. During the stitching, the piercing of the needles through the hide portions and the pulling through of the thread is effected whilst the sewing machine is at rest. The step-by-step onward movement of the sewing machine during the time when the needle lies beyond the hide portions, can also be effected by means of a spindle and a dynamically operating electromagnetic or mechanical brake.

The necessary drive can be providedby purely mechanical, electromagnetic, hydraulic or pneumatic means or by a combination of such means. e

The process particularly described has the following advantages a. Cutting occurs practically without loss of hair;

b. Accurate staggering is provided by a constant c. The staggering can be varied according to a predetermined program;

d. Accurate stitching is effected without the inclusion of hide hair;

' e. Smoothing in of hide hair during the stitching pro-.

cess is obviated, as the hair as a result of the pro- .cess is so-oriented that it cannot be stitched in;

the process,-independent of the of treatment of the hide by the hide operator working on it at the time;

j. Reduction of the labor force as several machines and conventional motive means coupled or otherwiseconnected to these various elements in a known-man ner so as to enable them to perform'their specified functions. The base means 4 is disposed to receive the hide to be let out and has an elongated opening 5 exf. Accuracy and cleanliness of letting out are, during tending along and about a reference cutting line. From FIGS. 2-5, it can be noted that the

holders

2 and 3 are operable to'grip the hide I along two first lengthwise regions disposed in opposite spaced-apart relation about the cutting line. These first regions are where the

plates

2 and 3 overlie the lip of the base means 4 that defines the boundaries of the opening 5. The holding

plates

2 and 3 are movable relative to each other along the cutting line and also movable relative to each other along a line transverse the cutting line. The second pair of holders, rail 6 and carraige 9 are located within the lateral boundaries of opening 5, and are movable relative to each other and cooperate to grip the hide along to second lengthwise regions disposed between the cutting line and the first regions. The rail 6 contacts the hide on the hair-free side thereof whereas the carraige 9 contacts the hair side of the hide and has means operable to part the hair of the hide along the cutting line as better seen from FIGS. 3and 4. The cutting means 14 that extends through slot 7 and rail 6 is operable to sever the hide along the cutting line to form and to separate hide parts for confronting edge portions. The relative movement of

plates

2 and 3 along the cutting line is operable to shift the hide parts into staggered rela tion, and the movement of

plates

2 and 3 transversely to the cutting line and relative to each other is effective to press together, as shown in FIG. 5, the confronting edge portions of the hide parts to accommodate stitching such hide parts together in the established staggered relation.

What is claimed is:

1. An apparatus for letting out hides and the like, which comprises a base means disposed to receive the hide to be let-out and having an elongated opening extending along and about a reference cutting line, a first tween the cutting line and said first regions, said second pair of holders including a rail which contacts the hide on the hair-free side thereof, and a carriage which contacts the hair side of the hide and has means operable to part the hair of the hide along said cutting line; cutter means operable to sever the hide along said cutting line to form twoseparate hide parts having confronting edge portions; said first pair of holders being movable one relative to the other along said cutting line to position said hide parts in staggered relation to one another, said first pair of holders being movable one relative to the other along said line transverse to the cutting line to press together the confronting edge portions of said hide parts to accommodate stitching said hide parts together in staggered relation.

2. An apparatus according to claim I wherein said first pair of holders are in the form of plates movable relative to the base means.

3. An apparatus according to claim 1 wherein said first pair of holders have facing edges which press together the confronting edge portions of said hide parts.

I rail and carriage are in overlapping alignment to-press pair of holders operable to grip the hide along two first 4. -An apparatus according to claim 1 wherein said between them the hide.

5. An apparatus according to claim 1 wherein the carriage has surfaces arranged to part the hair of the hide when pressed thereagainst.

6. An apparatus according to claim 1 wherein said rail has a longitudinal slit positioned in alignment with said cutting line and operable to receive and guide a cutter therealong 7. An apparatus according to claim 1 wherein said cutter means includes a motor-driven blade movable in parallel relation to edges of said first pair of holders and in alignment with said cutting line. =l

Claims

1. An apparatus for letting out hides and the like, which comprises a base means disposed to receive the hide to be let-out and having an elongated opening extending along and about a reference cutting line, a first pair of holders operable to grip the hide along two first lengthwise regions disposed in opposite spaced-apart relation about said cutting line, said first pair of holders being movable relative to each other along said cutting line and movable relative to each other along a line transverse to said cUtting line; a second pair of holders movable relative to each other and operable to grip the hide along two second lengthwise regions deposed between the cutting line and said first regions, said second pair of holders including a rail which contacts the hide on the hair-free side thereof, and a carriage which contacts the hair side of the hide and has means operable to part the hair of the hide along said cutting line; cutter means operable to sever the hide along said cutting line to form two separate hide parts having confronting edge portions; said first pair of holders being movable one relative to the other along said cutting line to position said hide parts in staggered relation to one another, said first pair of holders being movable one relative to the other along said line transverse to the cutting line to press together the confronting edge portions of said hide parts to accommodate stitching said hide parts together in staggered relation.

2. An apparatus according to claim 1 wherein said first pair of holders are in the form of plates movable relative to the base means.

4. An apparatus according to claim 1 wherein said rail and carriage are in overlapping alignment to press between them the hide.

6. An apparatus according to claim 1 wherein said rail has a longitudinal slit positioned in alignment with said cutting line and operable to receive and guide a cutter therealong

7. An apparatus according to claim 1 wherein said cutter means includes a motor-driven blade movable in parallel relation to edges of said first pair of holders and in alignment with said cutting line.