Patent ID: 7674054
Filing Date: 2010-03-09
Classification: B65H

Abstract:
1. A method for indicating receipt paper supply in a receipt printer, the method comprising: disposing a length of receipt paper around a roll core to create a receipt paper roll, wherein said length of receipt paper forms a rolled paper portion around said roll core, said roll core being of a contrasting color to said rolled paper portion; creating a detectable color contrast between said roll core and said rolled paper portion via said contrasting color of said roll core; scanning said roll core and said paper portion with an optical scanner logically associated with a computing resource; distinguishing between said roll core and said rolled paper portion with said optical scanner via said detectable color contrast; transmitting data pertaining to said roll core and said rolled paper portion from said scanner to said computing resource; computing said data to create measurements pertaining to a paper diameter of said rolled paper portion and a core diameter of said roll core, said paper diameter decreasing with usage of the paper supply; programming said computing resource to create at least one alert when at least one remaining length of said length of paper is reached on said roll, said at least one alert and said remaining length corresponding to a low paper condition; calculating said at least one remaining length via said measurements pertaining to said core diameter, said measurements pertaining to said decreasing paper diameter, and measurements pertaining to paper thickness of said length of receipt paper; alerting said low paper condition to a user; and computing said measurements pertaining to thickness of said length of receipt paper using paper fed data transmitted from the printer, at least two of said measurements of said decreasing paper diameter, and said measurement of said core diameter, wherein said paper fed data pertaining to length of paper that has been fed into the printer, and said at least two of said measurements of said decreasing paper diameter are taken successively.