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AssigneeFuji Xerox Co., Ltd.
InventorsMasuji Ogiwara, Kuninobu Nagano, Kimihito Ohmori, Harutaka Sudo
Estimating the term…
A vibration preventive system in use with an image recording apparatus of the type in which an original is scanned by reciprocatively moving an imaging unit by a stepping motor in two different types of scan modes, a forward scan mode in which an original read region is a constant speed region and a back scan mode to return the imaging unit to an original position at a high speed, the vibration preventive system comprising a drive current control for controlling a drive current fed to the stepping motor in such a way that in the constant speed region, drive current for driving the stepping motor is changed to a value smaller than that in an acceleration region. In the forward scan mode, the drive current is changed before the imaging unit reaches the registration position or after the end of acceleration in the forward scan mode. When the imaging unit is between them, the drive current is changed at a point in the undershoot of a transient vibration after the end of acceleration, or at the tail edge of the forward scan mode.
A driving device for a scanning system of an image recording apparatus having an original scan unit, to reciprocatively move the original scan unit in two types of scan modes, a forward scan mode to scan an original read region at a constant speed and a back mode to return the original scan unit to a scan start position at a high speed, said driver comprising:
A driving device for a scanning system of an image recording apparatus having an original scan unit, the driving device for repetitively applying a set of reciprocative scan motions of the scan system for a plurality of colors to a single sheet of original, the set of reciprocative motions of the scan system containing two types of scan modes, a forward scan mode to scan an original read region at a constant speed and a back scan mode to return the original scan unit to a scan start position at a high speed, the driver comprising:
A method for driving a scanning system of an image recording apparatus having an original scan unit driven by a stepping motor under control of a current change means, which repetitively applies, a set of reciprocative scan motions of the scan system for a plurality of colors to a single sheet or original, the set of reciprocative scan motions of the original scan unit containing two types of scan modes, a forward scan mode to scan an original read region at a constant speed and a back scan mode to return the original scan unit to a scan start position at a high speed, comprising the steps of:
A method of driving a scanning system of an image recording apparatus having an original scan unit driven by a stepping motor under control of a current change means for repetitively applying a set of reciprocative scan motions the scan system for a plurality of colors in a single sheet of original, the set of reciprocative scan motions of the original scan unit containing two types of scan modes, a forward scan mode to scan an original read region at a constant speed and a back scan mode to return the original scan unit to a scan start position at a high speed, comprising the steps of:
Dependencies are inferred from the claim text.