Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Presses or press platen structures – per se
Patent
1995-05-23
1997-06-10
Sells, James
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Presses or press platen structures, per se
1565831, 10026906, 100291, B30B 500
Patent
active
056371845
ABSTRACT:
An improved-efficiency welding device in a plastic bag production machine, of the type including an upper welding bar and a lower welding bar, at least one of which is driven with reciprocating vertical movement between a position separated from The plastics material to be welded and a position in contact with the plastics material and the lower or upper other bar, the movement of the at least one welding bar being imparted by a pair of vertically guided rods driven by a first eccentric linkage to which they are connected by a pin, the first linkage obtaining its movement from a central shaft, there being provided a second eccentric between the rod and the first eccentric linkage and driven by an additional motion transmission system which rotates it to cause the at least one welding bar to undergo a further lowering and/or raising movement at a predetermined stage, with resultant welding engagement between the an least one welding bar and the other welding bar.
REFERENCES:
patent: 4245516 (1981-01-01), Day
patent: 4276823 (1981-07-01), Rotzler
patent: 5015223 (1991-05-01), Boeckmann
patent: 5335532 (1994-08-01), Mueller et al.
patent: 5481898 (1996-01-01), Bakermans
ELBA S.p.A.
Sells James
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