US1757624A - Vulcanizer - Google Patents

Description

| o. GRANGE 'VULCANIZER May 6, 1930.

Filed May 23, 1927 f/zyzzzar [e0 ray 6 gm l M? ?aten ted May 6, 1936 UNITED STAT-ES PATENT OFFICE LEO o. GRANGE, on CHICAGO, ILLINOIS, ASSIGNOR T WALTER .I. JARRATT. or

. CHICAGO, ILLINOIS VULCANIZER Application filed Kay 28, 1927. Serial No. 193,465.

My invention relates to a retreading device for rubber tires. It has for one purpose the provision of means for preventing deformation of the tread at the ends of the matrix. Another purpose is the provision of an 1mproved end block for use with the retreader and matrix. Other objects will appear i'rom time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying draw ings, wherein- Figure l is a perspective view of my de vice' I 1 Figure 2 is a partial vertical section on an enlarged scalej Figure 3 is an end view of the retreading block shown in Figure 2;

Figure 4 is an elevation of the end block shown in Figures 2 and 3; and Y Figure 5 is a section on the line 5.5 of Figure 3.

Like parts are indicated by like symbols throughout the specification and drawings. A generally indicates the main housing or casing of the retreading device, the details of which form no part of the present invention.

It will be understood that it includes means for generating or directing the heat necessary for the retreading process. Positioned in the member A is any suitable holding member A in which is positioned, preferably removably, any suitable matrix A. A indicates the central aperture or cavity in which may be located any suitable heating medium for applying heat to the exterior of the matrix throughout substantially its entire area.

B generally indicates an end block adapted to be associated with the matrix and to pre-v 40 vent or reduce the heating of the tire beyond 1 the area of the matrix. The block includes a relatively thick forward member B of heat insulating material, adapted to contact the outer end of the member A and of the matrix A A I do not wish to be limited to any particular material, as the member B may be made of fiber, asbestos or any other suitable material or compound. Associated with it is a metallic casting or member B which is spaced away from the member B but is pro penetrating the member vidcd with flanges B which abut against the member B and enclose an extended dead air space Bf within the end block. The member B and casting B are secured to each other by screws B In order to secure the end block in position I provide'a plurality of fixed securing members C C. herein shown as bolts or screws A as at C The end block is notched as at C C to conform to said bolts, the bolt head serving to prevent movement of the plate away from the memberA At the opposite side of the member A is positioned a locking abutment C v Adapted to engage it is a lever latch includingthe abutment C upon the block B the link or stirrup C pivoted thereto and the lever C pivoted at the outer end of the stirrup C intermediate its ends, and provided with a rounded locking end C adapted to engage the member C In the operation of my device the tire, with the material to be vulcanized thereupon, is

seated in the matrix and is loclied in position bv means of the clamps D. The application of heat in the housing A heats the heating medium in the hollow A and applies heat evenly throughout the matrix A It is important that the rubber of the tire beyond the area to be retreaded be not softened, since otherwise it will give or run about the end of the matrix or end block, leaving an indentation or unevenness in the tire. The end plate therefore serves as a form or containerfor the portion immediately adjacent the end of the matrix Whichis inevitably softened,

and also prevents the heating of-that portion of the tire which projects beyond the outer edge of the block. The rubber of-the tire bemg a poor conductor it is necessary only to reduce the transmission of heat from the matrix along the block. This result I obtain by employing the thick fiber member B which is of heat insulating material. The conductioii of heat to the metallic portion B is further reduced by the interposition of the dead air space B which is in communication with the member B only by'the relatively thin flanges B 1 A further advantage of my device is the ready removability of the end block. One reason for the importance of this ready removability is the fact that it is often desirable to remove the end block in order to see that the pattern of the matrix matches properly with the pattern of the tire which is being vulcanized.

It will be realized that whereas I have described and shown a practical and operative device, nevertheless manychanges might be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my drawings and description to be taken as in a broad sense illustrative and diagrammatic rather than as limiting me to my specific showing.

I claim:

1. An end block for application to a retreading device and matrix, which includes a member composed of heat insulating material, and abody member secured thereto and insulated therefrom by an air space. headed abutment members fixed upon the retreading device. the end block being notched to receive them. an additional locking member positioned elsewhere upon the end block and a cooperating member treading device.

2. The combination with a vulcanizer housing and matrix of an end block adapted to be positioned upon said housing adjacent the end of such matrix and securing means therefor adapted to permit the ready removal of the end block from the housing. comprisingan overhanging projection on the housing positioned upon the readapted to penetrate an opposed notch in the end block, nd a pivotedlocking member adapted to connect the end block and housing at a point distant from said first mentioned securing'means.

3. A composite end block for vulcanizing devices comprising a metallic body member having a circumferential flange, a body of heat insulating material in direct contact with said flange and defining therewith a closed air space within the metallic body,

and a plurality of means securing said metallic body and said heat insulating member together, at least some of said securing means extending through said airspace to thereby minimize the conduction of heat to the me tallic body member.

4. A composite end block for vulcanizing devices comprising a metalilc-body member having a circumferential flange, a body of heat insulating material in direct contact with said flange and defining therewith a closed air space within the metallic body, means securing said metallic body and said heat insulating member together, and movable means for securing the end block as a unit to a vulcanizing device, said securing means being fixedly secured to the metallic body member.

5. A composite end block for vulcanizing devices comprising a metallic body member having a recessed face, a body of heat insulating material secured to said face. and

defining an enclosed dead air space within the metallic member, and means for securing the end block as a unit to a vulcanizing device, including a latch member permanently secured to the metallic body member.

6. In a vulcanizing apparatus, the combination of a mould, an end block therefor, and quick detachable locking means for securing the block to the mould.

7. In a vulcaniz'ing apparatus, the combination of a mould, an end block therefor, andquick detachable means for securing the block to the mould, said means including a pivoted latch member carried by the block.

8. In a vulcanizing apparatus, the com bination of a mould, an end block therefor, and quick detachable means for securing the block to the mould. said means including a lug carried by the mould and a cooperating member movably connected-to the end block.

Signed at Chicago, county of Cook, and State of Illinois, this 18th day of May, 1927.

LEO O. GRANGE.

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