US 4,231,652 AGranted

Drum for electrophotographic copier

AssigneeDevelop Dr. Eisbein GmbH & Co.

InventorsKurt Moser, Helmut Wegmann

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Abstract

A drum for an electrophotographic copier with the drum serving as an image support and being connected to a rotary drive of the copier, the drum including a stock roll for accommodating a supply of a photosensitive weblike semiconductor material and an empty or takeup roll for receiving the weblike semiconductor material. The semiconductor material is guided over the outer peripheral surface of the drum from the stock roll and is taken up by the empty roll by means of a preferably stepwise adjustable drive. The drum including the stock roll, takeup roll, and semiconductor material form an exchangeable unit adapted to be inserted as a whole into the electrophotographic copier. The drum includes a slit defined by two deflector rolls from which slit the semiconductor material is adapted to be led into and out of the interior of the drum.

Claims34

Dependent claims

A drum for an electrophotographic copier, the drum including an interior space, a stock roll means disposed in the interior space for accommodating a supply of weblike photosensitive semiconductor material, a takeup roll means disposed in the interior space for receiving the semiconductor material from said stock roll means, the semiconductor material extends from the stock roll means around an outer peripheral surface of the drum to the takeup roll means, characterized in that at least two deflector roll means are arranged at the drum for defining a slit means for enabling the semiconductor material to be led into and out of the interior space of the drum, the drum including the stock roll means, takeup roll means, and semiconductor material are constructed as an exchangeable unit adapted to be inserted into the electrophotographic copier, and in that quick release means are provided on the drum for connecting the drum to bearing means and a rotary drive means of the electrophotographic copier, said quick release means includes means for accommodating axially adjustable bearing pins arranged at the bearing means and rotary drive means of the electrophotographic copier.

A drum arranged within an electrophotographic copier, the drum including an interior space, a stock roll means disposed in the interior space for accommodating a supply of weblike photosensitive semiconductor material, a takeup roll means disposed in the interior space for receiving the semiconductor material from said stock roll means, the semiconductor material extends from the stock roll means around an outer peripheral surface of the drum to the takeup roll means, characterized in that at least two deflector roll means are arranged at the drum for defining a slit means for enabling the semiconductor material to be led into and out of the interior space of the drum, the drum including stock roll means, takeup roll means, and semiconductor material are constructed as an exchangeable unit adapted to be inserted into the electrophotographic copier, the copier includes opposed copier housing walls, a plurality of bearing pin means, means for mounting at least one of the bearing pin means at each of the opposed housing walls so as to be axially adjustable, and in that means are provided in the drum for receiving the axially adjustable bearing pin means.

A drum for an electrophotographic copier, the drum including an interior space, a stock roll means disposed in the interior space for accommodating a supply of weblike photosensitive semiconductor material, a takeup roll means disposed in the interior space for receiving the semiconductor material from said stock roll means, the semiconductor material extends from the stock roll means around an outer peripheral surface of the drum to the takeup roll means, characterized in that at least two deflector roll means are arranged at the drum for defining a slit means for enabling the semiconductor material to be led into and out of the interior space of the drum, the drum including the stock roll means, takeup roll means, and semiconductor material are constructed as an exchangeable unit adapted to be inserted into the electrophotographic copier, quick release means are provided on the drum for connecting the drum to bearing means and a rotary drive means of the electrophotographic copier, means are provided at axial end faces of the drum for mounting said supply roll means and said takeup roll means in the interior space of the drum, and a further drive means is provided for driving one of said stock roll means or said takeup roll means, said further drive means including an axially displaceable pin means mounted at a bearing cover of the bearing means and adapted to be selectively displaceable into a driving connection with one of said stock roll means or said takeup roll means, and in that means are provided for normally biasing the axially displaceable pin means into a non-driving position.

Dependencies are inferred from the claim text.