B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
93/37
B31B 23/00 (2006.01) B31B 19/18 (2006.01)
Patent
CA 1225538
ABSTRACT OF THE DISCLOSURE An apparatus for the manufacture of plastic bags from a flattened, tubular strip movable in the direction of production which comprises at least one roller, at least one output roller, a cutting apparatus and a transverse bag welding apparatus, wherein the cutting apparatus is structured and positioned so as to produce a wavelike cut in the strip running in the production direction, the wavelike cut defining two half strips which have complementary upper hand grips. Between the cutting apparatus and the transverse bag welding apparatus a detour apparatus is positioned which causes a phase shift in the half strips with respect to the wavelike cut and positions bag hand grips from opposing half strips over one another. The phase shifted half strips are jointly inputted into the transverse bag welding apparatus. The cutting apparatus has a cutting knife as well as a cutting knife control roller with cutting knife control thereon. The cutting knife is held in a cutting groove, that is, inputted over the grooved guide in which the cutting groove is positioned, the cutting groove having a width conforming to the amplitude of the wavelike cut previously mentioned. The control roller is positioned between two fixed support elements substantially before and above the cutting groove. The support elements carry a guide bar on which a cutting knife carriage is slidably mounted, and carries on one side a control pin which engages the cutting knife control groove and on the other side supports the cutting knife.
464738
Ley Willy
Stasiak Gunter
Borden Ladner Gervais Llp
Lemo M. Lehmacher & Sohn Gmbh Maschinenfabrik
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