Patent ID: 6017160
Filing Date: 2000-01-25
Classification: B41J

Abstract:
A sheet feeding device for feeding sheets having a front edge and a back edge through a printer, comprising:a) a controller for determining a line feed start position for the feeding of a sheet;b) a sheet selection unit communicating to said controller a selected sheet type having a sheet length;c) a sheet sensor communicating with said controller to detecting a front edge of a sheetd) a first roller having a first outer surface, a second roller having a second outer surface, such that said first outer surface is compressed against said second outer surface, wherein a sheet positioned between said first outer surface and said second outer surface, is rotatable conveyed through said printer; ande) a motor for driving a transmission, wherein said transmission is rotatably connected to said first roller;wherein said controller comprises a central processing unit, a sheet feed motor drive circuit connected to said central processing unit to operate said motor, and a sheet detection circuit connected to said central processing unit for receiving a detecting signal from said sheet sensor, said controller controlling the line feed start position to begin at a predetermined distance ahead of the front edge of the sheet and wherein the controller maintains the feed pitch for the sheet constant.