The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1993
Filed:
Jul. 31, 1991
James T Samuels, Rochester, NY (US);
Michael Newman, Pittsford, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A temperature control system (10) of an automatic film processor (12) includes developer and fixer recirculation paths (30, 40) having thermowell heaters (34, 44) and thermistors (35, 45), and a cooling loop (37) in the developer path (30) which passes in heat exchange relationship with water in a wash tank (23). The system (10) also has a blower (48), heater (49) and thermistor (52) in an air path of a dryer (24). Actual heating and cooling rates of heating and cooling cycles are determined based on temperature measurements by the thermistors (35, 45, 52). Heater (34, 44, 49) and cooling loop (37) malfunctions are identified by comparing actual rates with rates characteristic of normal operations. Periodic readings of a precision resistor (89) are made to check for failures in analog-to-digital (87), multiplexing (86) and thermistor (35, 45, 52) circuits. An error-responsive fresh film inhibit feature, with user selectable override, is provided.