Method and machine for manufacturing a multiplicity of linked fi

Details Method and machine for manufacturing a multiplicity of linked fi Method and machine for manufacturing a multiplicity of linked fi

1981-03-17

1984-01-10

Heinz, A. J.

Manufacturing container or tube from paper; or other manufacturi

Pliable container

Envelope

270 37, 493210, 493447, 493947, 493940, 493 90, 493448, B31D 302

Patent

active

044251114

ABSTRACT:
The invention concerns expanding files. A flat strip of flexible material (12) is progressively folded longitudinally to form a U-shaped channel. A length of the material equivalent to the developed width of a gusset is drawn forward. A precut partition with glued tabs (113) is placed at the rear of the drawn forward section of material. A fold is formed by pushing the three edges of the channel inwardly. This sequence of operations is repeated to form a multiplicity of pockets, comprising a plurality of parallel partitions joined along three edges to constitute respective filing pockets by the flexible material which is concertina-folded to constitute respective gussets. This multiplicity of pockets may be sectioned to provide separate expanding files. The invention comprises the manufacturing method and the machine for implementing same.

REFERENCES:
patent: 1968165 (1934-07-01), Olm
patent: 2677993 (1954-05-01), Ens
patent: 2696768 (1954-12-01), Mickey
patent: 3434400 (1969-03-01), Hochfeld

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