Thermal inkjet print head with a temperature regulation system and methods of making and using the same
AssigneeHewlett-Packard Development Company, L.P.
InventorsJohn B. Rausch, David A. Shade
Life of this patent
Estimating the term…
Abstract
A thermal inkjet print head includes a temperature regulation system. The print head preferably includes a thermal inkjet print head and an array or array of Peltier devices in proximity to the thermal inkjet print head such that the array of Peltier devices can raise or lower the temperature of the thermal inkjet print head or components thereof.
Claims14
A thermal inkjet print head comprising a temperature regulation system, said print head comprising:
- a thermal inkjet print head;
- an array of Peltier devices in proximity to said thermal inkjet print head such that said array of Peltier devices can raise or lower a temperature of said thermal inkjet print head or components thereof;
- a temperature sensor in proximity to said thermal inkjet print head for outputting a signal indicative of temperature;
- and
- a control circuit for receiving said signal indicative of temperature, said control circuit selectively applying current to said array of Peltier device to heat or cool said thermal inkjet print head in response to said signal indicative of temperature.
A thermal inkjet printing device comprising a temperature regulation system for a print head of said printing device, said printing device comprising:
- a thermal inkjet print head;
- an array of Peltier devices in proximity to said thermal inkjet print head such that said array of Peltier devices can raise or lower a temperature of said thermal inkjet print head or components thereof;
- a temperature sensor in proximity to said thermal inkjet print head for outputting a signal indicative of temperature;
- and
- a control circuit for receiving said signal indicative of temperature, said control circuit selectively applying a current to said array of Peltier device to heat or cool said thermal inkjet print head in response to said signal indicative of temperature.
A method of making a thermal inkjet print head, said method comprising:
- forming a thermal inkjet print head;
- forming an array of Peltier devices in proximity to said print head for regulating an operating temperature of said print head;
- forming a control circuit connected to said Peltier array for selectively applying a current in one of two directions to said Peltier array;
- and
- forming a temperature sen,or in said inkjet print head, said temperature sensor being connected to said control circuit for supplying a signal indicative to temperature to said control circuit, said control circuit applying said current in one of said two direction in response to said signal indicative of temperature.
Dependencies are inferred from the claim text.