Ronald Ernest Moseley

US Patent:

40025195, Jan 11, 1977

Filed:

Feb 12, 1975

Appl. No.:

5/549462

Inventors:

Ronald E. Moseley - Rock Hill SC
Henry G. Stewart - Harrisburg NC

Assignee:

Engraph, Inc. - Charlotte NC

International Classification:

B31B 114
B31B 122
B31B 1914
B31B 2114

US Classification:

156204

Abstract:

Successive pouches are formed from a web of plastic film by advancing the web through a folding station and folding the web along a longitudinal fold line to form a two-ply portion and a single ply portion adjacent thereto. At a sealing station, confronting surfaces of the two-ply folded portion of the web are sealed together along longitudinally spaced apart seal areas extending transversely across the two-ply portion to define a series of successive pouches interconnected by the seal areas. At a flap forming station predetermined waste areas are severed and removed from the single ply portion of the web to form the same into a series of successive flaps extending alongside each of the pouches and adapted for being folded over the pouches to close the same. The predetermined waste areas are quickly severed and removed by first piercing the single ply web at a predetermined point spaced from the free longitudinal edge thereof and corresponding to one end of the waste area, and then severing the single ply portion from the point of piercing along two spaced apart cut lines extending to the free longitudinal edge thereof. The waste area is graspingly engaged closely adjacent to the free longitudinal edge during severing to facilitate severing the waste area free from the remaining web, and is thereafter ejected clear of the advancing web by a blast of air.