Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing
Patent
1979-07-24
1981-05-19
Wityshyn, Michael G.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With cutting, punching, piercing, severing, or tearing
156443, 156497, 156515, 493194, B31B 186, B31B 2114, B31B 2116
Patent
active
042683467
ABSTRACT:
Carrier bags resembling tank tops or singlets with cut-outs at the top for defining the handles are made by intermittently feeding a flattened tubular plastics web to a welding station where transverse weld seams are applied and bag sections are successively severed from the leading web end while the web is clamped between jaws. Each bag section is received by a suction belt conveyor with the assistance of a pressure roller and is then transferred to a suction drum which co-operates with a cutting cylinder for forming the cut-out and is provided with a projectable and retractable blade for folding the bag section transversely.
REFERENCES:
patent: 3607573 (1971-09-01), Michaelides et al.
patent: 3671350 (1972-06-01), Westlake, Jr.
patent: 3805683 (1974-04-01), Hook
patent: 3813998 (1974-06-01), Lotto
patent: 3893884 (1975-07-01), Class
patent: 3966524 (1976-06-01), Lehmacher
patent: 4083747 (1978-04-01), Rochla
patent: 4131503 (1978-12-01), Plate
Windmoller & Holscher
Wityshyn Michael G.
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