| 摘要 |
Apparatus for enclosing sections of photographic roll films in transparent envelopes has two rolls of convoluted webs of weldable synthetic plastic material from which the webs are being withdrawn in such a way that their leading portions form a funnel. A severing device subdivides successive films into sections of requisite length, and a transfer device collects and introduces such sections into the funnel between the webs and all the way to a welding station where the webs are intermittently welded to each other to form envelopes each of which contains a single section or a stack of two or more superimposed sections. The webs can be severed subsequent to formation of each envelope or subsequent to formation of two or more interconnected envelopes to thus separate from the webs a series of discrete envelopes or a series of composite envelopes. Such composite envelopes can be folded in leporello fashion. |
