Channel letter machine and method thereof

Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Plural or complex apparatus

Reexamination Certificate

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C072S294000

Reexamination Certificate

active

07441434

ABSTRACT:
A channel letter bending machine for bending a return of a channel letter from a stock includes a feeding unit disposed along a path of travel of the stock to be bent for feeding the stock, a flanging unit for forming a flange along one edge of the stock, a notching unit for notching the flange of the stock fed by the feeding mechanism along the path of travel, and a bending unit for bending the stock under the control of the computer control system into the desired configuration for the channel letter shape, wherein the notching unit and the flanging unit are disposed upstream of the bending unit and the flanging unit is disposed upstream of the notching unit.

REFERENCES:
patent: 3097684 (1963-07-01), Le Tarte
patent: 3380145 (1968-04-01), Stroud et al.
patent: 4462237 (1984-07-01), Kauferle et al.
patent: 5689986 (1997-11-01), Jacobs, Jr.
patent: 5771725 (1998-06-01), Mizukawa
patent: 5881591 (1999-03-01), Ondracek
patent: 5970769 (1999-10-01), Lipari
patent: 6158264 (2000-12-01), Mizukawa
patent: 6167740 (2001-01-01), Lipari et al.

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