Endless belt power transmission systems or components – Positive drive pulley or guide roll – With particular belt
Patent
1990-05-02
1991-06-25
Kisliuk, Bruce M.
Endless belt power transmission systems or components
Positive drive pulley or guide roll
With particular belt
226 74, 474197, F16H 702
Patent
active
050263285
ABSTRACT:
A feed belt driving sprocket has a body molded of an elastic material. Two side faces of an inner circumferential portion of the sprocket body, except an outer circumferential portion formed with teeth, are formed with round fitting recesses concentric with an axial hole therein such that the inner circumferential portion of the sprocket body is thinner than the outer circumferential portion. The axial hole formed at the center of the sprocket body has small protrusions on its inner circumferential faces. Notched holes are provided in the sprocket body for facilitating elastic deformation of portions of the sprocket body. If a drive shaft is fitted into the axial hole of the sprocket body, the portions of the sprocket body near the axial hole are partially elastically deformed. The clearance between the drive shaft and the axial hole of the sprocket body is thus eliminated and the sprocket is immovably fitted onto the drive shaft. Portions of the sprocket body near the axial hole are elastic such that the small protrusions come into elastic contact with the outer circumferential faces of the drive shaft. Thus the contact between the sprocket body and drive shaft is a linear or point contact, establishing a relatively small sliding resistance therebetween. Thus a paper feeder can be moved in the axial direction of the drive shaft by a small force. During paper feed, any phase difference in rotation between the drive shaft and the sprocket can be eliminated.
REFERENCES:
patent: 1922357 (1932-06-01), Divney et al.
patent: 3771843 (1973-11-01), Clasper et al.
patent: 4130230 (1978-12-01), Seitz
patent: 4214691 (1980-07-01), Van Namen
patent: 4469263 (1984-09-01), Seitz
patent: 4472531 (1984-07-01), Seitz
patent: 4479598 (1984-10-01), Mailer et al.
patent: 4826337 (1989-05-01), Unuma
patent: 4836431 (1989-06-01), Hirth et al.
Kisliuk Bruce M.
Schoeppel Roger J.
Tokai Kogyo Kabushiki Kaisha
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