发明名称 |
ROTATING PUNCHING METHOD AND DEVICE FOR MAKING WINDOW CUT-OUTS IN ENVELOPES AND CARDBOARD BOXES |
摘要 |
A rotary punch device for making window cut-outs in envelopes and cardboard boxes, with a clamping device for clamping a metal foil having a cutting edge etched out of the foil material. Vacuum bores in the cylindrical surface of the rotary punch retain the material for treatment in position while the punched-out portion of the window is initially also retained by a vacuum and blown away by an air blast on completion of the punch operation. |
申请公布号 |
GB2133734(B) |
申请公布日期 |
1986.02.26 |
申请号 |
GB19840001695 |
申请日期 |
1984.01.23 |
申请人 |
* WINKLER & DUNNEBIER MASCHINENFABRIK UND EISENGIESSEREI GMBH & CO KG |
发明人 |
GUNTER * EHLSCHEID;HEINZ-HELMUT * FROST |
分类号 |
B26F1/10;B21D28/12;B26D7/01;B26D7/26;B26F1/38;B31B1/24;B31B1/82;B31B19/00 |
主分类号 |
B26F1/10 |
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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