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:
Apr. 25, 2000
Filed:
May. 20, 1998
Andreas Schweizer, Bad Ditzenbach, DE;
Reinhard Weltz, Leonberg, DE;
Eastman Kodak Company, Rochester, NY (US);
Abstract
The degree of wear of the paper transport roller (10) is checked by means of a reflected light barrier (40). To that end, the paper transport roller (10) comprises two layers (13 and 15) applied to the core of the paper transport roller (10). The two layers (13 and 15) differ in their degree of reflection for electromagnetic radiation. The layers (13 and 15) are applied to the paper transport roller (10) such that the inner layer (13) has a lower degree of reflection than the outer layer (15). The inner layer (13) is advantageously black and the outer layer (15) white. When the outer layer (15) is worn as a result of the friction between the single sheet (30) to be transported and the paper transport roller (10), the inner layer (13) gradually comes into contact with the single sheets. The degree of reflection of the surface of the paper transport roller (10) then also changes in the same way and is determined using a reflected light barrier (40). The user is therefore signaled that the paper transport roller (10) must be replaced.