Compact low paper sensor mechanism

Details Compact low paper sensor mechanism Compact low paper sensor mechanism

2007-12-18

2009-06-23

Colilla, Daniel J (Department: 2854)

Typewriting machines

Sheet or web

For feeding web record-medium

C242S595100

Reexamination Certificate

active

07549814

ABSTRACT:
A low paper sensor mechanism including first and second support rollers rotatable about a first and second rotational axis to support a paper supply roll, the first and second support rollers and rotational axes configured to translate in a path between a first position and a second position, first and second biasing members biasing the first and second support rollers toward the second position and a detection device, including a light emitting element and a light detecting element, disposed adjacent to the first and second support rollers, wherein the first and second support rollers move from the first position to the second position when a diameter of the paper supply roll is less than or equal to the predetermined distance between the first and second support rollers and the paper supply roll disrupts a line of sight between the light emitting element and the light detecting element.

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Research Disclosure Document No. 345074, Anonymous, “Sensing low paper supply in a point of sale printer,” Jan. 1993.
Machine translation of JP 08085650 to Murakami from Japanese Patent Office website, Apr. 1996.
Machine translation of JP 10167538 to Takifuji from Japanese Patent Office website, Jun. 1998.
Translation of JP 03-89037 U; Mizoguchi, Tetsuo; Sep. 1991.

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