| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | Apparatus for producing transverse weld seams in a two-ply web of plastic film | US583541 | 1975-06-04 | US3996093A | 1976-12-07 | Aloys Winnemoller |
| In an apparatus for producing transverse weld seams in a continuously fed two-ply web of plastics film and comprising a rotary welding cylinder about which the web is partially slung and which is provided with a plurality of welding bars at its periphery, the welding bars are steplessly adjustable radially of the cylinder, the smallest spacing between adjacent said transverse weld seams corresponds to twice the spacing between adjacent welding bars when the latter are in their retracted position, steplessly radially adjustable supporting members for the web are provided between the welding bars, and the welding bars are energizable by a sequence control in a sequence which is independent of the number of said welding bars. | ||||||
| 62 | Continuous high speed plastic bag fabricating machine | US532093 | 1974-12-12 | US3994209A | 1976-11-30 | George Jacob |
| A method and apparatus for the continuous manufacture of plastic bags from an extruder which includes a differential tachometer which senses the speed of the film in two locations so that the film drive can be adjusted to compensate for the shrinkage of the film and to eliminate tension in the film. Welding and perforating blades are provided which contact the travelling film and travel with the film to complete their weld and perforations before returning to their initial positions. One type of welding and perforating device uses a pair of opposed blocks which come together around the film and travel with the film while the perforating blade pierces through the film and the weld is being completed. A timing cam coupled to the film drive determines the spacing of the welds and perforations and thus the length of each bag produced. A separating device is also included so that if the bags are perforated and include a cut line along their perforations, a pair of faster moving rollers can be engaged to the moving film to pull the perforations apart and separate the bags. | ||||||
| 63 | Continuous business form or the like adapted for subsequent processing into original indicia bearing lottery tickets, envelopes or the like | US433464 | 1974-01-15 | US3956049A | 1976-05-11 | Edward L. Johnsen |
| A continuous business form which includes a series of connected blanks adapted to be subsequently processed into multi-ply lottery tickets, envelopes or like articles, is produced from an endless web of sheet material. Each blank is developed from an odd number of continuous panels which span the width of the web wherein adjacent, non-abutting panels define the various plies of each article, and wherein one surface of certain of the non-abutting panels is provided with an adhesive which is not activated for adhering to other panels of the form until after original indicia has been applied to the non-abutting panels which are thereafter superposed in overlying relationship for producing the continuous series of multi-ply forms wherein each ply contains original, directly applied indicia. | ||||||
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