Patent ID: 6791714
Filing Date: 2004-09-14
Classification: G03G

Abstract:
An image forming apparatus which is for use in printing data sent from an upper apparatus, said image forming apparatus comprising:storing means for storing said bit map data of characters and symbols; extracting means for extracting contour-protecting shaped matrix data having a contour-protecting shape which prevents a contour of image from disappearing; printing means for printing said dot data based on said contour-protecting shape; template data memorizing means for memorizing template data which previously define a standard shape of a character and a symbol; toner consumption saving pattern memorizing means for memorizing toner consumption saving pattern data which corresponds said standard shape or character and said symbol; and toner consumption control means for forming a final shape which is printed finally based on each of said contour-protecting shaped matrix data, said template data,and said toner consumption saving pattern data; wherein said printing means, in response to said contour-protecting shape matrix data, produces an unbroken contour of a character or symbol having a width of two pixels and a reduction of pixel density in the interior of said character or symbol.