发明名称 |
METHOD OF MANUFACTURING A PILE SUITABLE FOR FORMING AT LEAST ONE EXPANSIBLE FILE, AND MACHINE FOR EXECUTING THE METHOD |
摘要 |
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. |
申请公布号 |
DE3166406(D1) |
申请公布日期 |
1984.11.08 |
申请号 |
DE19813166406 |
申请日期 |
1981.03.31 |
申请人 |
CHAZELAS, MARIE DU CARMEL;CHAZELAS, DANIEL;CHAZELAS, GILLES REPRESENTE PAR MME DEROUETTEAU-CHAZELAS |
发明人 |
CHAZELAS, ANDRE |
分类号 |
B42F7/00;B31B45/00;B31B49/00;B31D5/04;B42F7/08;(IPC1-7):B42F7/08 |
主分类号 |
B42F7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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