Patent ID: 6695424
Filing Date: 2004-02-24
Classification: B41J

Abstract:
A device for printing paper from a pre-wound roll having an end flange of selectable diameter defining type of wound on the roll, comprising:a. a frame for rotatably holding the roll and defining a path for paper transport; b. a table slidably movable along said frame responsively to rolling contact with said flange according to contacted flange diameter; c. a mechanism for rotatably permitting paper roll, comprising paper roll holders mounted concentrically on at least one end of said roll and connected to said frame, the combination of outer diameter and color of a peripheral surface of said paper roll holder corresponding to the type of said roll paper; d. light transmitting and blocking members connected to said table and moving along said frame unitarily with said table; e. light sensitive means fixedly connected to said frame and positioned to receive light through or be blocked from receiving light by said transmitting and blocking members according to position of said table along said frame and producing an electrical signal indicative therefor; f. means for storing data reflecting type of ink available for dispensing; g. a movable print head adapted for emitting ink supplied thereto against paper unwound from said roll; h. means for optically detecting a color characteristic of said holder and producing an electrical signal indicative thereof; i. means for comparing said signals indicative of table position and color characteristic with preselected stored data reflecting acceptable printing for the combination of detected paper type and available ink and determining appropriate image processing and print head driving parameters; j. means for operating said print head according to said driving parameters to print said processed images on said paper advanced from said roll.