Title:
【発明の名称】高解像度多色インクジェットプリンタ
Document Type and Number:
Japanese Patent JPH09507806
Kind Code:
A
Abstract:
A high resolution ink jet printer includes a rotating drum (14) and a pair of ink jet heads (20, 22) scanned along a substrate (24) carried by the drum (14) in a direction parallel to the axis of the drum. The heads (20, 22) are driven by a lead screw (36) coupled to the drum drive shaft (26) and a control unit (44) controls the rate of drop ejection from the printheads (20, 22) at a rate corresponding to the rate of encoder signals received from an encoder (42) coupled to the drum drive draft (26). One printhead (20) receives and ejects drops of black, magenta, cyan and yellow high-density inks and the other printhead (22) ejects drops of black, magenta and cyan low-density inks along with another ink which may be a different color or black ink of a different density. High resolution and high print quality are assured by accurate control of the distance between the drum support shaft (26) and the drum surface and also between the drum support shaft (26) and a carriage support rail (88) on which the printhead (20, 22) is supported as it moves adjacent to the drum surface. For hot melt ink, a heater (100) is provided adjacent to the drum surface to maintain the drum surface temperature at a constant level below the melting point of the ink and a housing (12) surrounding the printer has a controlled temperature zone to maintain the ambient temperature about 10 DEG C below the drum temperature.
Inventors:
Hoisington, Paul A
Spareley, Charles W. Junior
Spareley, Charles W. Junior
Application Number:
JP53350296A
Publication Date:
August 12, 1997
Filing Date:
May 02, 1996
Export Citation:
Assignee:
Spectra Incorporated
International Classes:
B41J2/01; B41J2/175; B41J2/195; B41J2/205; B41J2/21; B41J11/00; B41J13/22; B41J19/16; (IPC1-7): B41J2/205; B41J2/21
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)