The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 1989
Filed:
Feb. 26, 1988
Applicant:
Inventors:
Assignee:
Laurel Bank Machines Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250239 ;
Abstract
A dust-proof tube for a photosensor including of a cylindrical portion having a thick wall and substantially the same length as that of the photosensor, the inner diameter of the cylindrical portion being substantially equal to the outer diameter of the photosensor so that the cylindrical portion can receive the photosensor sealingly, and a frustum portion integrally formed with the cylindrical portion and extending from the end of the cylindrical portion, the cylindrical portion and the frustum portion being made of elastic material.