Method of manufacturing printed springs

Metal working – Method of mechanical manufacture – Spring making

Patent

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Details

101226, B21F 3500

Patent

active

056493630

ABSTRACT:
A spring to operate a merchandise dispenser used for storing and dispensing a plurality of like items of merchandise. The dispenser utilizes a metal spring having indicia imprinted or engraved thereon to provide both a biasing force to the merchandise and inventory information. A method is provided for producing a metal spring having indicia printed in ink or paint.

REFERENCES:
patent: 2425553 (1947-08-01), Musselman et al.
patent: 3205583 (1965-09-01), Purbaugh
patent: 4106668 (1978-08-01), Gebhardt et al.
patent: 4742936 (1988-05-01), Rein
patent: 5011015 (1991-04-01), Ziegler et al.
patent: 5012936 (1991-05-01), Crum
patent: 5127324 (1992-07-01), Palmatier
patent: 5131563 (1992-07-01), Yablans
patent: 5178063 (1993-01-01), Wolfberg et al.

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