Sheet inspection and marking system

Details Sheet inspection and marking system Sheet inspection and marking system

1978-11-01

1980-05-20

Lawrence, Evan K.

Coating processes

Nonuniform coating

Paper or textile base

118 42, 118669, 118670, 118681, 118713, 427293, B05D 512, B05C 912

Patent

active

042040124

ABSTRACT:
A method and apparatus for inspecting and marking flawed sheet material is disclosed. Sheet material is moved from a supply along its length through a path to a cutter. The sheet material is visually inspected as it moves along its path, and a temporary electrically conductive mark is applied to the moving material at a predetermined distance away from any flaw that appears in the sheet material. The temporary mark is electrically detected at a position along the path the same predetermined distance away from the cutter as the flaw moves into the cutter, and as the last portion of the segment to be cut from the sheet material moves to the cutter, the sheet material is marked with a permanent mark. The sheet material is then cut and folded, and the permanent mark is located at a predetermined position in the folded segment of sheet material, no matter at what location in the segment of the sheet material the flaw appears.

REFERENCES:
patent: 2091522 (1937-08-01), Perry
patent: 2342474 (1944-02-01), Klein et al.
patent: 3290167 (1966-12-01), Wood et al.

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