US2454347A - Staking machine - Google Patents

Description

Nov. 23,1948. I G. ASCHETTLE l 2,454,347

STAKING MACHINE FildMach 5, 1947 2 sheets-sheet 1 /zven tor GustavASohez'zZer l B his Attorney Nov. 23, 1948. l

' Filed March 3. 19.47

G. A. SCHETTLER sTAKIN MACHINE 2 sheets-sheet 2 Patented Nov. 23, 1948 STKING MACHINE Gustav A. Schettlen Leeds, England,assignor to The Turner Tanning Machinery Company,

Portland, Maine,a corporation of Maine Application March 3. 1947, serial No. 731,958 In Great Britain April 9, 1946 This invention relates to improvements in leather staking machines, and is herein illus; trated as applied to the well-known Slocomb type of staking machine commonly used to soften skins by flexing the same and loosening the bers. Machines of this type are disclosed in the patents to F. F. Slocomb No. 1,268,637 an'd C. F. Stackpole Machines of the above-mentioned type are usually provided with a work table which is divided into two parts separated by a rectangular opening or space between them about nine or ten inches wide. Two long, opposed and cooperating' arms or jaws extend toward the operator from the rear of the machine, one of the jaws being located above and the other jawV below the rectangular opening or space in the table. The upper jaw is conventionally provided with a soft member such as a rubber roll at its end and the lower jaw is usually provided with a staking -tool such as a blade or .a number of blades extending upwardly in the general direction cf the rubber roll. When the machine is initially at rest, the jaws are open and in a retracted position to permit the operator to place a work piece upon the table and across the table opening. As the jaws move toward the operator, he'shifts an untreated portion of the skin on the Vsurface of the tableto a position between the jaws. upon and grip the skin and move rearwardly or away from the operator, the skin being held stationary 'either by the operator or by means of a clamping device. In so doing the leather is pulled and caused to flex sharply over the blades and around the rubber1 roll thereby softening the skin. The operator shifts the position of the skin with each forward movement of the jaws in order to treat the full area of the skin. In the case of calfskins the grain surface is usually placed uppermost and presented to the rubber roll, the blade acting upon the flesh side. `In the case of suede leather, however, the flesh side is generally presented to the rubber roll. In such a machine the leather may be held at one end or edge on a table or bed either by the operator pressing upon the leather itself or upon an appropriate member or by means of work gripping or clamping L'means adapted to hold the leather during working or rearward strokesy and to release it during the idle or forward strokes.r The operator 'is therefore enabled to move the work piece in order to bring the different portions thereof intocontact with the leather treating ftools and secureuniform treatment of them.

In machines of this type'as heretofore conf The jaws then close' 3 Claims. (Cl. Gil- 34) the flesh side.

istructed there has been a tendency, when the leather is pulled over the edge or edges of the staking 4knife or knives for the grain of the leather to be stretched to a greater extent than As a consequence, when the leather is laid flat thegrain has appeared to be what is called pipey. Pipey leather is leather the grain surface'of which forms coarse, dark and loose wrinkles displeasing to the eye when :it is bent with the grain inward. Another defect of such a machine as heretofore constructed is that the edges of the leather have usually been insufficiently treated. v

An object of the present invention is to provide an improved machine by the use of which the pipey effect is largely eliminated and by the operation ofwhich the edges of the leather may` more easily and adequately be treated.

Another object of the invention is to provide an. improvedl leather staking machine which will produce little or substantially no friction on the grain or iinished side of the leather being treated.

To this end, and in accordance with an important feature ofthe invention, an endless resilient belt vis mounted upon rotatable rollers and ar-` ranged to bear against one side of the leather being treated and tocoact with a staking tool or tools bearing against the other side of the leather, the belt and staking means being bodily movable within paths which are in vertical alinement with an opening in a work supporting table.

Afurther feature comprises means for adjusting the'operative elements of the` machine to vary the effective pressure of the working tools upony the material undergoing treatment.

These and otherimportant `features of the invention will be described in detail in the speciicaton and pointed out in the appended claims.

In the drawings, f

Fig. 1 is a fragmentary side elevational View' of. so much only of a staking machine of the type concerned asis necessary to illustrate the application thereto" of the improved leather staking means of the present invention, a portion of the Work supporting table being shown in section;

Fig. 2 is a plan view of one suitable arrangement for the staking tools as they are supported from beneath the work supporting table of the machine;

Fig. 3 is a'front View of the staking head as seen in the direction of the arrow in Fig. 1, the table being shown insection; and f Fig. 4 i's a detailtransverse view partially in sectiontaken on the lineIV--IV of Fig. 1, showu centrally between the two rollers 32 and 34 whereas for heavy staking the tool holder 86 may be moved nearer to a position directly below the center line of the roller 34, the tool holder 84 disposed directly below the center of the resilient belt 30, and the tool holder 82 placed as near as possible to a, position beneath the center of the roller 32, that is, in the region where the belt 30 is firmly backed by the last-mentioned roller.

As the machine operates, the jaws l and |2 move rearwardly i. e. away from the operator with the jaw components closed, as shown in Fig. 1. On each return or forward stroke the jaws are opened and a leather work piece |04 is inserted between them and placed upon the work table |00 or a partially treated work piece is shifted to present a different portion of the work piece in position to be treated. It will be evident that during each rearward or working stroke the jaw components move relative to the work piece |04 and the latter is pulled over the staking knives 90 and treated to its extreme edge. The belt 30 and the knives 90 are moved rearwardly in performing their functions and, simultaneously, the rollers 32 and 34 rotate as the belt 30 moves bodily in contact with and relative to the upper side of the work piece |04. During each successive working stroke the work piece |04 is firmly held by the operator against the rubber end piece |05 on the edge of the work table. During successive return strokes, with the jaws open, the leather work piece |04 is moved so as to present fresh portions of its surface and substance for treatment by the staking knives 90.

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

Number 1. In a leather staking machine of the character described having two opposed and cooperating jaws, one of said jaws being provided with rollers supporting an endless resilient belt, and the other jaw carrying a staking tool arranged to press a skin to be treated against said belt.

2. In a leather staking machine of the character described, an endless resilient belt mounted upon rollers, means for varying the tension of said belt, said belt being arranged to move bodily in contact with and relative to one side of a skin, a staking tool arranged to press the said skin against the belt during said bodily movement, and means for adjusting the position of said tool relative to said belt.

3. In a leather staking machine of the character described, a table with a rectangular opening therein, an endless resilient belt mounted upon rollers and bodily movable over and substantially parallel with two sides of said opening, said belt being arranged to rotate the rollers by contact with a skin supported on the table because of said bodily movement, and staking means supported from the other side of the table and arranged to displace the belt a desired distance into the zone between the rollers during said bodily movement.

GUSTAV A. SCHETTLER.

REFERENCES CITED The following references are oi' record in the le of this patent:

FOREIGN PATENTS Country Date 350,685 Great Britain June 18, 1931

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