Title: Thermograph with removable cartridge

Abstract: A time temperature recording device especially adapted to the business of transporting perishables and characterized by a preloaded returnable instrument of permanent nature packaged in a protective liner held secure and warranted by a sealed box that is expendible, with separate access openings for exclusive use of shipper and receiver respectively, and wherein a logic means permits depression of a stylus onto a pressure sensitive chart when instrument operation is started by the shipper, and lifts said stylus and releases said chart when stopped by the receiver. The used instrument is especially adapted to be returned by the Postal Service.

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Inventors: Maxwell, William H. (West Los Angeles, CA, US)

Application Number: 470901
Filing Date: 1974-05-17
Publication_date: 1976-07-20
Assignee: Cargo Graphics Corporation ()
Primary Class(es): 346/33TP 206/305, 206/523, 374/186
Other Classes:
US Patent Ref:

2516124	Jul, 1950	Kishibay	206/523.
2937820	May, 1960	Wilson	346/136.
3138100	Jun, 1964	Peschko	53/36.
3157303	Nov, 1964	Siegel	73/362.
3204385	Sep, 1965	De Remer et al.	53/36.
3251460	May, 1966	Edmonds	206/523.
3404945	Oct, 1968	Barter et al.	346/33.
3436967	Apr, 1969	Post	73/430.
3520769	Jul, 1970	Baker	206/523.
3540284	Nov, 1970	Sellers et al.	73/362.
3787885	Jan, 1974	Johnson	346/33.
3848735	Nov, 1974	McGee et al.	206/523.
3868697	Feb, 1975	Schefe	73/343.

Other Refs: 692,944

Aug, 1964	CA

Primary Examiner: Queisser, Richard C.
Assistant Examiner: Yasich, Daniel M.
Attorney: