EP 0288182 A1 19881026 - Rotary cutting apparatus.
Title (en)
Rotary cutting apparatus.
Title (de)
Rotationsschneidgerät.
Title (fr)
Appareil de coupe rotative.
Publication
Application
Priority
US 3807987 A 19870414
Abstract (en)
A method and apparatus particularly suited for cutting continuously moving thermoplastic film such as linear low density polyethylene includes a stationary anvil, preferably a roller of tool steel and a tungsten carbide die mounted for rotation along a circular arc intersecting the anvil. In an embodiment for punching holes in the film, the apparatus includes a saddle shaped hollow tungsten carbide die projecting slightly above the cylindrical surface of a roll passing under a spring biased tool steel roller for cutting a semicircular hole in a continuously moving continuous plastic film web for the manufacturer draw tape bags. A vacuum is supplied to the center of the die for removing the segment of plastic film cut out by the apparatus. In an alternate embodiment, the rotary cutting apparatus includes a tungsten carbide plate member having a straight cutting edge is rotated along a circular arc at the end of support mounted to a shaft to intersect a spring biased roller supported along the arc to cut a perforation in a continuous plastic film passed between the straight cutting edge and roller. The alternate embodiment is suited for employing a plurality of the rotary cutting devices at spaced stations for cutting perforations across a moving film web.
IPC 1-7
IPC 8 full level
B26D 1/40 (2006.01); B26D 7/18 (2006.01); B26F 1/20 (2006.01); B26F 1/38 (2006.01); B31B 1/14 (2006.01); B31B 50/20 (2017.01)
CPC (source: EP)
B26D 1/405 (2013.01); B26D 7/1863 (2013.01); B26F 1/20 (2013.01); B26F 1/3846 (2013.01); B31B 50/14 (2017.07); B31B 50/146 (2017.07)
Citation (search report)
- DE 3302038 A1 19840726 - WINKLER DUENNEBIER KG MASCH [DE]
- US 3106121 A 19631008 - ABRAHAM NOVICK
- DE 2722972 A1 19771124 - KOBE STEEL LTD
- DE 2054474 A1 19710909 - IBM
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 88303102 A 19880407; JP 9261588 A 19880414