Winding – tensioning – or guiding – Convolute winding of material – With cutting – perforating – or notching
Patent
1997-05-06
1999-04-20
Nguyen, John Q.
Winding, tensioning, or guiding
Convolute winding of material
With cutting, perforating, or notching
2425261, 83426, 834361, B65H 3502, B65H 3508, B26D 706
Patent
active
058950060
ABSTRACT:
A perforator apparatus for continuous photo film includes a perforator unit having a punch and a die. The perforator unit is disposed between first and second suction chambers. The photo film is extended past each of the suction chambers. A blower applies suction of air through the suction chambers, to apply tension to the photo film through the perforator unit. The perforator unit is disposed between a feed roller and a sprocket roller, which convey intermittently the photo film by a punching length. A first pass roller continuously conveys the photo film into the first suction chamber. A first loop of the photo film in the first suction chamber is maintained with a length substantially of an arc of a semi-circle defined between the first pass roller and the feed roller. A second pass roller continuously conveys the photo film from the second suction chamber. A second loop of the photo film in the second suction chamber is maintained with a length substantially of an arc of a semi-circle defined between the second pass roller and the sprocket roller. The perforator unit forms a train of perforations in the photo film along each of its two edges when the photo film is stopped.
REFERENCES:
patent: 3083926 (1963-04-01), Herr
patent: 4928562 (1990-05-01), Tanimura et al.
patent: 5461450 (1995-10-01), Long et al.
Hase Akihiko
Kambara Takayuki
Karaki Hideyuki
Wakabayashi Akira
Yamashita Seiichi
Fuji Photo Film Co. , Ltd.
Nguyen John Q.
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