Method and an arrangement for the folding and sealing of the lon

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

156227, 156443, 156461, 156497, 156499, 156547, 493243, 493331, 493442, B65B 720

Patent

active

046067841

ABSTRACT:
In the manufacture of packing containers from laminated material contact between the inner layer of the material and the contents is avoided by doubling up the cut edges present in the packing container. It has proved to be difficult to perform a secure folding and sealing of the folded edge without damage to the material, since the outer, water-tight layer of the material consists of very thin, heat-sensitive thermoplastic. This difficulty is overcome by carrying out the folding and sealing of the edge of the material web gradually while at the same time supplying heat or glue. By supplying the sealing-promoting agent as late as possible during the course of folding, damage to the material as well as to the folding arrangement is avoided.

REFERENCES:
patent: 2001399 (1935-05-01), Scharwath
patent: 2015445 (1935-09-01), Bierer et al.
patent: 2783693 (1957-03-01), Felber
patent: 3130649 (1964-04-01), Striplin et al.
patent: 3340849 (1967-09-01), Adams et al.
patent: 3398661 (1968-08-01), Mathes et al.
patent: 3527631 (1970-09-01), Ryburn
patent: 3562920 (1971-02-01), Vuilleumier
patent: 3579396 (1971-05-01), Washburn
patent: 3602029 (1971-08-01), Burke, Jr.
patent: 3711352 (1973-01-01), Wagers et al.
patent: 3791185 (1974-02-01), Knudson
patent: 3978191 (1976-08-01), Allen et al.
patent: 4097632 (1978-01-01), Minogue
patent: 4251312 (1981-02-01), Ziegler et al.
USSR article, "Can Sealing Machines", (1939), with translation.

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