Laterally translatable roll apparatus

Details Laterally translatable roll apparatus Laterally translatable roll apparatus

G - Physics

03

G

314/32, 341/47

G03G 15/01 (2006.01) H04N 1/12 (2006.01) H04N 1/193 (2006.01)

Patent

CA 1214501

- 1 - ABSTRACT A laterally translatable roll apparatus supporting a continuous web of material, albeit for supply or take-up, is designed to maintain a roll in proper alignment as the web is paid from or rewound onto the roll. The apparatus comprises a pair of frame members to rotatably support the roll therebetween. A roll drive means has a drive shaft extending to one end of the roll. An interengagable coupler means is provided on both the output end of the roll drive shaft and the one end of the roll to permit the roll to be rotatably driven by the roll drive shaft while not being directly secured thereto. Means is axially mounted at the one end of the roll and biased to move axially outward away from the roll for engagement against the output end of the drive shaft. This axially mounted biased means may comprise a spring loaded plunger mounted in one end of the roll. Lateral translation drive means is mounted on the other of the frame members with translation output means engaging but not secured to the other end of the roll. Circuit means controls the lateral translation drive means to laterally translate the lateral output means which results in lateral translation of the roll without interfering with the rotational operation of the roll via the roll drive means. The lateral translation drive means may comprise a stepper motor mounted on the other frame member with its drive shaft in axial alignment with the rotational axis of the roll to apply translatory motion to the roll via the translation output means. An application for the laterally translatable roll apparatus is lateral translation of a recording medium roll in an electrographic printing or plotter system as the recording medium is paid from or rewound onto a medium roll to properly align the medium for desired aligned movement through one or more stations comprising such a system.

441293

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