Title:
【発明の名称】有効なフィードバック温度データが存在しない場合のフィルムプロセッサの温度制御
Document Type and Number:
Japanese Patent JPH06502933
Kind Code:
A
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 heat exchanger (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). Heater (34, 44, 49) and cooling heat exchanger (37) operation is normally controlled on a closed loop, feedback mode basis by comparing measured current temperatures in real time with preestablished setpoint temperatures. When system errors cause an absence of current valid measured temperature data, shutdown or lockout can be overridden, and temperature control continued on an open loop basis using stored historical measurement data and on-off duty cycle profiles.
Inventors:
James Thomas, Samuels
Newman, Michael
Newman, Michael
Application Number:
JP50610293A
Publication Date:
March 31, 1994
Filing Date:
September 10, 1992
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
G03D3/00; G03D3/13; G03D13/00; G03D15/02; (IPC1-7): G03D3/00; G03D15/02
Attorney, Agent or Firm:
Kyozo Yuasa (6 people outside)