Method and apparatus for conveying expanded film

Details Method and apparatus for conveying expanded film Method and apparatus for conveying expanded film

1995-07-25

2000-06-20

Stodola, Daniel P.

Advancing material of indeterminate length

Processes

Involving plural feeding means

226 16, 226 24, 226189, B65H 2318, B65H 4308, B65H 2000

Patent

active

060767189

ABSTRACT:
A film conveying apparatus includes a conveying mechanism and a speed control mechanism. The conveying mechanism includes a plurality of lower rollers arranged in a lateral direction perpendicular to a film conveyed direction. The lower roller is equipped with a motor to variably control its speed. A plurality of upper rollers is disposed to correspond to the lower rollers so as to sandwich the continuous film with the lower rollers. The roller-speed control mechanism controls a rotation speed of each lower roller so that the film is conveyed at a desired speed in a desired direction.

REFERENCES:
patent: 3664561 (1972-05-01), Feiertag
patent: 3696186 (1972-10-01), Stark et al.
patent: 4554713 (1985-11-01), Chabal
patent: 5138341 (1992-08-01), Kobayashi
patent: 5219109 (1993-06-01), Shirono
patent: 5476546 (1995-12-01), Zibulla
Patent Abstracts of Japan, vol. 7, No. 47 (M-196) [1192] & JP-A-57 195055 (Hitachi Seisakusho K.K.) Nov. 30, 1982.
Patent Abstracts of Japan, vol. 6, No. 7 (c-087), Jan. 16, 1982, & JP-A-56 129648 (Central Glass Co., Ltd.) Oct. 09, 1981.
Patent Abstracts of Japan, vol. 10, No. 134 (M-479) [2191], May 17, 1986 & JP-A-60-258036 (Fuji Xerox K.K.), Dec. 19, 1985.
International Publication No. WO 91/07340, May 1991; Long.

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