| 摘要 |
A severing device for use in a semiautomatic machine for facilitating the wrapping of an article with thermoplastic film material. The device is designed as an adapter to fit into a presently known machine to permit the removal of the hot wire presently used in such machines for severing the film and to replace such hot wire by a mechanical device for this purpose whose location and operation will not appreciably, if any, require alteration of the manual sequence previously known for effecting such wrapping. The device includes a knife and knife bed assembly which is relatively movable by electrical means. At least one limit switch is positioned adjacent the meeting zone of the knife and knife bed assembly so that upon movement of the thermoplastic film downwardly by the same motion as previously placed same against the hot wire for severing, the film will contact and actuate the limit switch and thereby actuate the knife and knife bed assembly for effecting such severing. A hot plate for sealing is positioned on the adapter in a position substantially similar to that in which it was placed on the original machine and is accordingly available to function in the same manner as previously known.
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