MISREGISTRATION WHEN PRINTING SPEED IS CHANGED, CUTTING MISREGISTRATION, OR PINTER IN WHICH VARIATION OF PRINTING DENSITY CAN BE CONTROLLED

Title:

MISREGISTRATION WHEN PRINTING SPEED IS CHANGED, CUTTING MISREGISTRATION, OR PINTER IN WHICH VARIATION OF PRINTING DENSITY CAN BE CONTROLLED

Document Type and Number:

WIPO Patent Application WO/2003/080342

Kind Code:

A1

Abstract:

The characteristic of variation of misregistration of a pattern printed by printing units (4A, 4B, 4C, 4D) of when the printing speed is changed is predicted for each specific printing condition influencing the registration variation characteristic. The phase control characteristic of the plate cylinders (5, 5, 5, 5) of the printing units(4A, 4B, 4C, 4D) for canceling the vertical misregistration of the patterns printed by the printing units (4A, 4B, 4C, 4D) is predetermined on the basis of the predicted registration variation characteristic and stored in a database (32). Out of the phase control characteristics stored in the database (32), a phase control characteristic satisfying the printing condition concerning the current printing is selected while the printing speed is changed. The phase relationship between the plate cylinders (5, 5, 5, 5) of the printing units (4A, 4B, 4C, 4D) is varied continuously according to the selected phase control characteristic. Thus, the variation of vertical registration when the printing speed is changed is suppressed, thereby preventing paper waste caused when the printing speed is changed.

Inventors:

NOBUKAWA SATOSHI (JP)
MAKINO SHIGEO (JP)
SENOO SHINICHIRO (JP)
HAMAMOTO YOSHITAKA (JP)

Application Number:

PCT/JP2003/003526

Publication Date:

October 02, 2003

Filing Date:

March 24, 2003

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)
NOBUKAWA SATOSHI (JP)
MAKINO SHIGEO (JP)
SENOO SHINICHIRO (JP)
HAMAMOTO YOSHITAKA (JP)

International Classes:

B41F13/12; (IPC1-7): B41F33/14; B41F33/00; B41F33/06; B41F31/02; B41F31/12; B41F13/60; B65H45/28

Foreign References:

JP2000255037A	2000-09-19
JP2000301700A	2000-10-31
JP2000168053A	2000-06-20
JPS57163331U	1982-10-14
JPS5593454A	1980-07-15
JP2001001500A	2001-01-09
JP2003048309A	2003-02-18

Attorney, Agent or Firm:

Sanada, Tamotsu (10-31 Kichijoji-honcho 1-chom, Musashino-shi Tokyo, JP)

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