Electrophotography – Diagnostics – Component present or mounted
Patent
1998-04-22
2000-02-22
Royer, William J.
Electrophotography
Diagnostics
Component present or mounted
399 90, 399117, G03G 1500
Patent
active
060290196
ABSTRACT:
An image recording device for forming a toner image on a photosensitive drum using an electrophotographic technique. The image recording device includes opposed metallic frames each having a notch for receiving and supporting an end of a metallic shaft of the photosensitive drum so that the photosensitive drum is supported between the metallic frames. A plate spring is located in the vicinity of one of the metallic frames such that the plate spring is forced to contact the photosensitive drum shaft when the photosensitive drum is supported between the metallic frames. The metallic frames have a fixed relation relative to a main frame of the image recording device. A power source is connected to the plate spring and the associated metallic frame is earthed. Thus, a current flows from the power source to the plate spring, the drum shaft and the associated metallic frame in turn when the photosensitive drum is supported on the metallic frames. This current is detected to determine whether the photosensitive drum unit has been in a desired position.
REFERENCES:
patent: 4933718 (1990-06-01), Furuya
patent: 5521693 (1996-05-01), Kojima et al.
patent: 5581325 (1996-12-01), Tsuda et al.
patent: 5845173 (1998-12-01), Zogg et al.
Murata Kikai Kabushiki Kaisha
Royer William J.
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