Metal working – Method of mechanical manufacture – Spring making
Patent
1995-06-28
1997-07-22
Echols, P. W.
Metal working
Method of mechanical manufacture
Spring making
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.
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patent: 4106668 (1978-08-01), Gebhardt et al.
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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.
Echols P. W.
Vulcan Spring & Mfg. Co.
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