US2520343A

US2520343A - Pounce bag for dusting molds

Info

Publication number: US2520343A
Application number: US22641A
Authority: US
Inventors: George E F Saum
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-04-22
Filing date: 1948-04-22
Publication date: 1950-08-29
Anticipated expiration: 1967-08-29

Description

Agg. 29, 1950 G. E. F. sAUM 2,520,343

POUNCE BAG FOR DUSTING MOLDS Filed April 22, 1948 2 Sheets sheet l @e dzam,

Patented Aug. 29, 1950 UNITED. N STATES PATENT OFFICE 2,520,343 PONCE BAG FOR DUSTING MOLDS IGreorge E. F. Saum, Chicago, Ill. u Application April 22, 1948, Serial No. 22,641

In order to secure acceptable results, molds for use in the formation of thermoplastic materials require frequent lubrication through the application of a powder. Generally the material powdered for such use is zinc stearate.

f Heretofore it has been the practice to place a quantity of this powder on a piece of cloth-usually arag or material discarded from other usesand after drawing the perimetrical portions together tying and/or taping the gathered portions to provide a grip for the hand to permit the banging of the powder bag against the mold. All too often this has presented problems. Such cloth as would permit the sifting of the powder would result in an excess emission of powder onto the mold. Not infrequently such cloth has been of such a nature asto be easily injured by the mold, resulting in the cloth breaking. When that happens a mold becomes fouled with an excessive amount of powder, too often resulting in defective pieces being produced by the subsequent use of the mold. Moreover, aside from the waste, the dust gets into the press bearings, causing excessive wear, and the air becomes filled with dust which is detrimental to the health of workmen.

` The main objects of this invention, therefore, are to provide an improvedforin of` pounce bag for use in dusting molds, particularly metal molds used for `forming thermoplastic materials; toa provide an improved bag of this kind capable of eecting an even and uniform sifting of the powder but so formed as to long resist deterioration with its consequentexcessive emission of powder and breaking of the bag resulting from extended recurring striking thereof against the corners, edges, and protuberances of `the mold` coniigurations; to provide an improved bag construction of this kind comprising superimposed layers of fabric of differing characteristics of thread one of which is adapted to sift the powder and the other of which is adapted to resist wear; to provide` an improved fabric arrangement of this kind the perimetricalportions of which can be gathered to enclose the powder and form a hand grip convenient for holding the bag during the pouncing operation; fto provide improved draw-string means for gathering the perimetrical portions of said layers of cloth to form the bag and lacing the same together so asto make highly convenient the filling, closing, and subsequent relling of the bag; and to provide an improved pounce bag of this kind which is inexpensive to make,` efficient in use, and of `great durability.

In the"`drawings,

Claims. ('Cl. 15--131.1)

Fig. l is a perspective view of a preferred `form of pounce bag, constructed in `accordance with this invention, the perimetrical` portions being laced together as they would normally he to enclose the powder and form a hand grip.,` When initially filled with powder the bag part would have a much more extended bag part than here shown;

Fig. 2 is a plan view of the ungathered superimposed layers of cloth as viewed from the exposed side of the coarser material, the ends of a draw-string enclosed in a, perimetrical casing being threaded through the end eyelets in the tucks bordering the radially-disposed gore;

Figf3 is a similar view taken from the opposite or inside of the superimposed layers;

, Fig. 4 is an enlarged diagrammatic cross-sectional view of the gore and tucks taken on the line 4-4 of Fig. 2; u

Fig.` 5 is an enlarged diagrammatic cross-sooftional view` of the perimetrical portion of the superimposed layers, taken on the line 5-5 of Fig. 2;

` Fig. `6 is a view similar to Fig. 2 showing a modified arrangement of the draw-string;

Fig. 7 is an opposite or inside view of the same;`

Fig. 8 is a perspective view similar to Fig. 1 but showing the form the folds take with the modified arrangement of` the draw-string shown in Figs. 6 and 7 Fig. 9 is anenlarged diagrammatic cross-sectional view of the gore and tucks for the modica# tion shown in Fig. 6, taken on the line 9-9 of Fig. 6; and

Fig. 10 is an enlarged diagrammatic cross-sectional view of the perimetrical portion of the modiiication shown in Fig.` 6, taken on the line leamoitie 6.

A pounce bag constructed in accordance with this invention comprises two superimposed circular layers of cloth Ii `and l2 stitched together around their `perimetrical portions and also stitched together along lines nearly radial to form a radially-disposed gore section i3 bordered by tucks i4. A draw-string I5, threaded through the perimetrical portions of these superimposed layers and through the tucks I4, is adapted to gather said perimetrical portions together to form a bag or container for powder and provide a hand grip for convenient use in holding the bag when striking it against the mold so as to sift powder on the surfaces thereof.

The layers of fabric II and l2 are of different character, one designed to serve as a sieve, the 0th?? 159 ,IGSS Wear. To that end the inner layer I I is formed of comparatively fine threads, whereas the outer layer I2 is formed of coarser threads. The inner layer iI is thus a fabric much like that from which flour sacks are made, through which the powdered material is adapted to be sifted. On the other hand, the outer layer i2 is a fabric in the nature of light duck or canvas. This outer layer I2 has far greater durability and resistance to wear than does the inner layer II, thus providing an extended life for the bag.

In the preferred form, as shown in Figs. 1 to 5 inclusive, the stitching of the layers around their perimetrical portions is such as to provide a casing I' in which to contain the lacing or drawstring I5.

In the modified form, as shown in Figs. 6 to 10 inclusive, the same perimetrical stitching is provided. However, eyelets I'I are securedl around this perimetrical casing portion ofv the layers at circumferentially spaced points.

The gore section I3 is formed by stitching the layers together along nearly parallel and substantially radially-disposed lines so as to form` a, section within which the gathered perimetrical portions of the superimposed layers may be drawn by the draw-string I5. In either modification, spaced eyelets I8 are xed in the tucks I through which the draw-string I5 may be threaded. y

The lacing or draw-string l5 is of conventional character and, as indicated, may either be enclosed in the perimetrical casing I6 as shown in Fig. 5 or threadedthrough the perimetrical eyelets I'I, asl shown in Figs. o, 7, and 8, with the free ends in either case threaded through opposite eyelets I8 formed in the tucks I 4.

A pounce bag constructed in accordancel with either of lthe modifications herein shown is used in the following manner. l

A quantity of powdered material is placed in the center f the inner layer of clothII. The Surrounding perim'etrical portion of the layers is gathered up around the powdered material and -the draw-string I drawn up to bring the perimetrical portions close together. I The ends of the draw-string are then threade'dthrough the eyelets I'B in the tucks Ill embracing the gatheredportion of the layers. As the string I5 is drawn up the gathered portion of the layers II and I2 is compressed into the space between the tucks I4,- and provides -a hand grip which may be grasped for striking the bag part against the mold so as to sift the powder onto the surfaces thereof. When it is desired to replenish the powder in a bag of this character it may be very conveniently done by simply unlacing the drawstring I5, pulling apart the gathered perimetrical portions, pouring a quantity of powder, and again drawing up the lacing I 5. a

Other variations and modifications in the details of structure and arrangement of the parts may be resorted to within the spirit and coverage of the appended claims.

I claim:

1. A pounce bag for use in dusting molds comprising superimposed coextensive layers of powder-pervious woven fabric one of which layers is formed of comparatively fine threads adapted primarily to provide a sifter for powder and the other of which layers is formed of threads comparatively tougher than the threads for said one layer and thereby adapted to provide a covering with a high capacity for resisting wear caused byvstriking the bag against the mold, and means for gathering th-e perimetrical portions of Said 4 superimposed layers of fabric to form a container for the powder and provide a hand grip by which to hold the pounce bag when striking the mold.

2. A pounce bag for use in dusting molds comprising superimposed coeXtensive circular layers of powder-pervious woven fabric one of which layers is formed of comparatively ne threads and woven primarily to provide a sifter for powder and the other of which layers is formed of threads and a weave adapted to provide a covering with a maximum capacity for resisting wear caused by striking the bag against the mold, said layers being stitched together along their perimetrical portions to form a casing, and a drawstring -arranged in said casing to permit the gathering of the perimetrical portions of said superimposed layers of fabric to form a container for the powder and provide a hand grip by which to hold the pounce bag when striking the mold. Y

3. A pounce bag for use in dusting molds comprising `superimposed coextensive circular layers of powder-pe'rvious woven fabric one of which layers is formed of comparatively ne threads and woven primarily to provide a sifter for powder and the other of which layers is formed of threads and a weave and adapted to provide a covering with a maximum capacity for resisting wear caused by striking the bag against the mold, said layers being stitched together to forma radially-disposed gore section bordered by tucks', eyelets formed in said tucks and a draw-string slidably attached t0 the perimeter of said superimposed layers and adapted to be `threaded through the eyelets in said tucks whereby Ythe drawing of said string will gather the perimetrical portions of said superimposed layers .of fabric to form a container for the powder and fold the gathered portion of said layers. between said tucks' so as to provide a hand grip by which to hold the pounce bag when striking the mold.

L A pounce bag for use in dusting molds comprising superimposed coextensive circular layers of powder-pervious woven fabric one of which layers is formed of comparatively fine threads closely woven so that it is adapted to sift vpowder therethrough and the other of which layers is formed of coarser threads than the threads for said one layer and likewise closely woven and adapted to provide a covering with a maximum capacity `for resisting wear caused by striking the bag against the mold, said layers being stitched togetherto' form a radially-disposed gore section bordered by tucks, eyelets formed in said tucks and in the perimetrical portions of said superimposed fabrics, and a draw-string threaded through the eyelets in said perimetrical portion and adapted to be threaded through the -eyelets in said tucks whereby the drawing of said string will gather the perimetrical portions of said superimposed layers of fabric to form a container for the powder arid fold the Vgathered portion of said layers between said tucks so as to provide a hand grip by which to` hold the pounce bag when striking the mold.

5. A pounce bag for use in dusting molds, comprising superimposed, coextensive, circular layers of powder-pervious woven fabric, one of which layers is formed of iine threads and Woven primarily to provide a sifter for powder and the other of which layers is formed of threads and a weave adapted to provide a covering with maximum capacity for resisting wear caused striking the bag against the mold, said layegg 5 6 ing stitched together to form a radially-disposed REFERENCES CITED gore section bordered by tucks eyelets formed The following references are of record in the in said tucks, and a draw-string threaded fue of this patent: through the eyelets of said tucks, whereby the drawing of said string will gather the perimetri- 5 UNITED STATES PATENTS cal portions of said superimposed layers of fab- Number Name Date ric to form a container for the powder and fold 303,848 Hill Aug. 19, 1884 the gathered portion of said layers between said 471,680 Bailey Mar. 29, 1892 tucks so as to provide a hand grip by which to 919,065 Page Apr. 20, 1909 hold the pounce bag when striking the mold. 10 1,424,649 Krohn Aug. 1, 1922 GEORGE E. F. SAUM