The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2008
Filed:
Jul. 07, 2006
Takeshi Watanabe, Hitachinaka, JP;
Akihiko Yamazaki, Hitachinaka, JP;
Sho Sawahata, Hitachinaka, JP;
Takeshi Watanabe, Hitachinaka, JP;
Akihiko Yamazaki, Hitachinaka, JP;
Sho Sawahata, Hitachinaka, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
The invention provides a film driving apparatus in which no adverse effect is caused by a change in the circumferential length of a film even if there arises the change in circumferential length of the film due to environmental fluctuation. In the film driving apparatus, an endless filmsupported by a driving roller, a film support rollerand a skew correction rolleris rotated in a predetermined direction by the rotation of a driving roller. The skew correction rollerhas a structure in which one end thereof is movable with the other end as a fulcrum. The movement trajectory of the movable end portion of the skew correction rolleris an elliptic trajectory not causing any change in the circumferential length of the film