Drum for image recording apparatus
First Claim
1. A drum for an image recording apparatus comprising:
- a main body member comprising a plurality of separate cylindrical members, each comprising an outer surface and two end surfaces separated in an axial direction, said cylindrical members being arranged serially in said axial direction, each of said cylindrical members having a plurality of openings in opposite end surfaces thereof for attracting a recording material against a surface wall constituted by said outer surfaces of said cylindrical members;
a pair of side members for closing two sides of said main body member and forming a chamber internal of said surface wall, wherein said side members also are cylindrical and also are arranged in said axial direction; and
a shaft member arranged to penetrate said main body and said pair of side members, so as to be disposed internal of said surface wall and to be secured to at least said pair of side members, in which a through hole establishing a connection between said chamber and outside is formed therein.
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Accused Products
Abstract
A drum for an image recording apparatus for absorbing and winding a recording material for the purpose of recording the image by an exposure head thereof. The main body of the drum is structured by arranging a plurality of cylindrical members having a relatively smaller axial direction. Since the drum is formed by arranging the cylindrical members, the drum can be readily manufactured. A guide is provided on the outer surface of the drum, this guide guiding, pressing, and retaining the front portion of the recording material to the outer surface of the drum so that the absorption of the recording material is conducted assuredly. The shaft of the drum is borne by a radial ball bearing which has a sealing member so that air leakage when the absorption is conducted is prevented.
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Citations
8 Claims
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1. A drum for an image recording apparatus comprising:
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a main body member comprising a plurality of separate cylindrical members, each comprising an outer surface and two end surfaces separated in an axial direction, said cylindrical members being arranged serially in said axial direction, each of said cylindrical members having a plurality of openings in opposite end surfaces thereof for attracting a recording material against a surface wall constituted by said outer surfaces of said cylindrical members; a pair of side members for closing two sides of said main body member and forming a chamber internal of said surface wall, wherein said side members also are cylindrical and also are arranged in said axial direction; and a shaft member arranged to penetrate said main body and said pair of side members, so as to be disposed internal of said surface wall and to be secured to at least said pair of side members, in which a through hole establishing a connection between said chamber and outside is formed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification