Pin tractor

Details Pin tractor Pin tractor

1985-05-24

1986-09-30

Christian, Leonard D.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

4006161, G03B 130

Patent

active

046142878

ABSTRACT:
Pin tractors which are used in various printers, typewriters, etc. for use as output devices for electronic computers, especially for personal computers. This pin tractor has a synthetic resin frame around which a belt carrying pins is wound revolvably and a presser member made of synthetic resin supported revolvably by said frame. Blank paper having feed perforations at its both edges is held between said frame and said presser member. Pins of said belt carrying pins are engaged with feed perforations of blank paper for feeding blank paper. Said presser member has pawl parts and said frame has concaves to correspond to said pawl parts. Said pawl parts are fitted in said concaves to keep said presser member opened in the specific degree.

REFERENCES:
patent: 4079633 (1978-03-01), Cheema et al.
patent: 4194660 (1980-03-01), Seitz
patent: 4457463 (1984-07-01), Hubbard et al.

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