US1700979A - Sand bag - Google Patents

Description

Feb. 5, 1929. 1,700,979

N. s. DODGE SAND BAG Filed Deo. 22, 1926 INVENTOR.

ATToRNE-Ys.

Feta. 5, l929.

Uhll'll) STATES NATHANIFL S. DODGE, OF PIEDMONT, CALIFDRNIA.

SAND BAG.

Application filed December 22, 1926. Serial No. 156,418.

'.lhis invention relates to sand bags and particularly that type employed in vulcanizing automobile tires.

lt has been customary. in the past, 'to Weave the sand in straight lengths With a Warp thread running lengthwise and the rsa1-p thread of uniform diameter. In actual practice, the bags are filled With sand and the ends are tied. The are then placed interiorly of the tires, When these are placed in the vulcanizingl machines and as such the bags must be bent to conform to the interior curved surface of the tire. The bags wear out on the exterior surface Where they come in contact with the tire and they, furthermore, have a tendency to ltinlr thus presenting an uneven surface to the tire. The warp thread kis also placed under stresses when bent to conform to the curve of the tire and Wear and tear is thus further increased.

rlhe object of the present invention is to generally improve and simplify the construction and operation of sand bags of the character described; to provide a tubular elongated sand bag which is Woven on the arc of a circle thereby reducing the bending action when the bag is inserted in the tire and eliminating stresses in the Warp thread and further to provide a sand bag in which the Warp thread is arranged in sections, an inner section consisting of a comparatively fine warp thread, an intermediate section consisting of coarser Warp thread and an eX terior section consisting of a still coarser or heavier Warp thread. The employment of the coarser thread in the exterior section is of great importance as it presents a heavier fabric and, accordingly, resists Wear to a greater degree.

The invention is shown by Way of illustration in the accompanying drawings in which Figure l is a partial side elevation of the sand bag,

Figure 2 is a cross section of the same,

Figure 8 is a sectional view of a portion of a vulcanizing machine showing the position of the tire and sand bagtherein.

Referring to the drawings in detail, and particularly Figure l, it Will be noted that the bag is Woven in the form of a semi-circle when viewed from a side elevation and further that a Warp or longitudinally running thread of varying diameter is employed. The Warping thread is preferably arranged in three sections indicated at A, B and C. The section indicated at l Will hereinafter be referred to as the inner section. the section indicated at B as the intermediate section and the section indicated at C as the outer section. The Warp thread employed in the inner section is comparatively tine? as indicated at 2, the Warp thread employed in the intermediate section is coarser, as indicated at 3 and the Warp thread employed in. the outer section is still coarser or heavier, indicated at et. The result produced is an elongated tubular fabric bag which is semi-circle in side elevation and substantially circular in cross section.

In actual practice7 the bag is filled with sand and the ends are tied together, as indicated at 5 (see Figure The bag is placed Within the tire shown at 6 and the bagg together with the tire is placed within the vulcanizing machine. The exterior or coarse surface of the sand bag indicated at C comes in contact with the inner surface of the tire and the innermost section of the sand is engaged by a clamping shoe 7 Which forces the sand bag snugly against the inner surface of the tire and as such holds the tire against the mold surface, the clamping shoe being7 of course, held in position by clamping screws or the like indicated at 8.

As previously stated, the exterior surface of the bag or that surface which contacts with the inner surface of the tire is subjected to the greatest Wear. This is taken care of in the present instance by employing a coarse Warp thread. The intermediate section and the inner section is subjected `to less Wear and as such may be Woven from a. liner thread. Employment of a Warp thread of gradually increasing diameter of further importance. as it permits greater llexibil ity or bending action as far as the sand bag is concerned. This bending action is again materially promoted due to the fact that the bag` is Woven in the form of a semi-circle or arc and lrinking of the bag when placed Within the tire is thus positively avoided.

lVhile certain features of the present invention are more or less specifically described, I Wish it understood that various changesmay be resorted to Within the scope ofthe appended claims. Similarly that the materials and linishes of the several part-s employed may be such as the manufacturer may desire or varying conditions or uses may demand.

Having thus described my invention. What I claim and desire to secure by Letters Patent is l. A device of the character described comprising an elongated tubular fabric bag, in which the warp and filler threads are Woven to form a tubular bag which is arcuate shaped in side elevation and substantially cylindrical in cross section, said Warp threads being comparatively fine at the inner surface and comparatively coarse at the outer surface.

2. A device of the character described comprising an elongated tubular fabric bag in which the warp thread runs longitudinally of the bag, and increases in diameter from the inner to the outer surface, the thread being comparativel).7 line at the inner surface and comparatively coarse at the outer surface.

3. A device of the character described comprising an elongated tubular fabric bag in which the Warp thread runs longitudinally of the bag and is arranged in three sections, an inner, an intermediate and an outer section, said inner section consisting of a comparatively fine Warp thread, the intermediate section consisting of a| coarser Warp thread and the exterior section consisting of a still coarser Warp thread.

4;. A device of the character described comprising an elongated tubular fabric bag in Which the Warp thread runs longitudinallyv of the bag and increases in diameter from the inner to the outer surface, the thread being comparatively fine at the inner surface and comparatively coarse at the outer surface, said bag being Woven in the shape of a semicircle when viewed from the side.

5. A device of the character described comprising an elongated tubular fabric bag in Which the Warp thread runs longitudinally of the bag and is arranged in three sections, an inner` an intermediate and an outer section, said inner section consisting of a comparatively line Warp thread, the intermediate section consisting of a coarser warp thread and the exterior section consisting of a still coarser Warp thread, said bag being woven in the form of a semi-circle when viewed from the side and being` substantially circular in cross section.

NATHANIEL S. DODGE.

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