Method and apparatus for measuring shape of sheet

Details Method and apparatus for measuring shape of sheet Method and apparatus for measuring shape of sheet

2007-01-02

2007-01-02

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S559360, C250S559220

Reexamination Certificate

active

11033875

ABSTRACT:
The method of making an online measurement of a shape of a conveyed sheet, the method comprises the steps of: imaging continuously at least two edge portions of entire the conveyed sheet in a widthwise direction of the conveyed sheet from a leading end to a trailing end of the conveyed sheet in a direction of conveyance of the conveyed sheet by means of a CCD line sensor; processing an image obtained in the imaging step to extract a sheet image portion corresponding to the conveyed sheet in the obtained image; and obtaining the shape of the conveyed sheet according to the sheet image portion extracted in the processing step.

REFERENCES:
patent: 4499383 (1985-02-01), Loose
patent: 6311539 (2001-11-01), Yeo et al.
patent: 6333511 (2001-12-01), Talmi
patent: 5-52526 (1993-03-01), None
patent: 6-147836 (1994-05-01), None

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