Positioning apparatus for a printer

Details Positioning apparatus for a printer Positioning apparatus for a printer

2008-09-16

2009-08-18

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231130, C250S559290, C250S234000, C033S707000, C347S019000

Reexamination Certificate

active

07576312

ABSTRACT:
A positioning apparatus for a printer. The positioning apparatus includes at least one encoder, an OPC belt, and a code strip consisting of a reference bar code region, a blank region and a normal bar code region. The OPC belt is moved relative to the encoder and has a joint region. The code strip is mounted on the OPC belt and has multiple of bar codes. The encoder is used for detecting the bar codes and generating a displacement signal representing a displacement of the OPC belt moved relative to the encoder. The blank region may adjoin the joint region. Therefore, a home position can be located precisely by the displacement signal due to the existence of the reference bar code region and blank region.

REFERENCES:
patent: 7085001 (2006-08-01), McKim
patent: 7439488 (2008-10-01), Chen

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