US 5,181,888 AGranted

Belt driving system

AssigneeBando Chemical Industries, Ltd.

InventorsMitsuhiko Takahashi, Hirofumi Miyata, Shinya Yuki, Keizo Nonaka, Yoshihisa Nakano, Hiroshi Mitsuhashi, Katsuya Yamaguchi, Yasuhiko Yoshida

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Abstract

A belt driving system having at least one roller for adjusting creep within a plurality of rollers. Creep detecting means provided at one end of the creep adjusting roller is rotated by torque of a flat belt in contact with the creep detecting means. Biasing means for biasing the flat belt toward the creep detecting means and roller-end displacing means for converting the torque of the creep detecting means to displacement of the end of the creep adjusting roller toward a predetermined direction so that the flat belt is moved to the direction contrary to the creep caused by the biasing means are provided. When the flat belt creeps, the creep contrary to the original creep is caused by the roller-end displacing means, and thus the original creep is compensated. Consequently, stable running of the flat belt is obtained and clear pictures of the electrophotographic machine can be also obtained.

Claims14

Dependent claims

A belt driving system comprising:

a flat belt;
a plurality of rollers, said flat belt being wound round said rollers, at least one of said rollers being a drive roller, and at least one of said rollers being a creep adjusting roller for adjusting creep of said belt;
creep detecting means, supported by an end of said creep adjusting roller, rotatable independently from said creep adjusting roller;
biasing means for biasing said flat belt toward said creep detecting means;
and
roller-end displacing means, connected to said creep detecting means, for converting torque received by said creep detecting means when said flat belt is in contact with said creep detecting means to a movement for displacing said end of said creep adjusting roller in a predetermined direction so that said flat belt is moved in direction contrary to creep caused by said biasing means;
said roller-end displacing means comprising a woundable member having one end thereof connected to said creep detecting means for winding said woundable member and another end connected to a fixed member.

4 more elements

Dependencies are inferred from the claim text.