摘要:
A method for manufacturing table tennis balls. The halves of a ball are formed in a single sheet and the sheet is separated to separate the formed halves of the ball. One of the portions of the sheet containing a ball half is inverted relative to the other and the portions are aligned so as to align the ball halves the rein. The sheet portions are then welded together to join the ball halves and the completed ball is removed from the joined sheet portions.
摘要:
A METHOD FOR THE MANUFACTURE OF RELATIVELY THIN PIECES USEFUL IN THE MAKING OF COMPONENTS FOR SHOES, MOROCCO ARTICLES AND OTHER SIMILAR ARTICLES. A MOLD IS PREPARED BY CATING THE ARTICLE IN A MOLD OF SILICONE CONTAINING MATERIAL WHICH HAS LOW DIELECTRIC LOSSES. A SHEET OF ABSORBENT MATERIAL SUCH AS PVC FOAM IS IMPREGNATED WITH A PASTRY OR PULVERULENT PLASTIC MATERIAL OF THE SAME CHEMICAL NATURE AS SAID SHEET AND HAVING A HIGH COEFFICIENT OF DIELECTRIC LOSSES. ON OR BELOW SAID PLASTIC-IMPREGNATED SHEET IS DISPOSED A SUPPORTING SHEET OF LEATHER, TEXTILE OR OTHER SUITABLE MATERIAL. A CLOSE MUTUAL BONDING OF THESE ELEMENTS IS INSURE BY THE COMBINED ACTION OF COMPRESSION AND THE APLICATION OF HIGH FREQUENCY CURRENTS FOR GELLING AND MELTING THE PLASTIC MATERIALS OF SAID SHEET AND SAID PASTRY OR PULVERULENT PLASTIC MATERIAL, THUS CAUSING THE COMPLETE DISAPPEARANCE OF SAID SHEET OF ABSORBENT MATERIAL.
摘要:
1,072,185. Seaming non-metallic sheet material. KALLE A.G. Oct. 7, 1964 [April 1, 1964], No. 40922/64. Heading B5K. [Also in Division B8] Juxtaposed flattened marginal zones of body and lid portions of thermoplastic containers are joined for subsequent ready separation and reclosing, by being heated and then curled together to form inter-engaged beads. Two opposed rims may be so joined or a single rim 9 of two hinged members, Fig. 12. Containers fed forward by a conveyer 2 have their margins or rims on one or both sides fed into a slot in a heating element 5a followed by the initial stage of the curling device 5b, the slot 14 of which gradually reduces as the bore 12 moves towards the container as at 5c, Fig. 7. The stage 5b may also include heaters 11 and a bore 13 for cooling process may be provided in the final stage.