Title:
THERMAL PLATE MAKING APPARATUS
Document Type and Number:
Japanese Patent JP2638390
Kind Code:
B2
Abstract:
PURPOSE: To form a printing image faithful and stable with respect to any manuscript image by setting the sizes of the respective heating elements provided to a thermal head to values calculated from four specific calculation formulae.
CONSTITUTION: The heating elements 50 provided between the pattern layers 6 of a thermal head 4 are arranged in one row in a main scanning direction at a dot pitch scanning direction at a dot pitch Pa and the dot pitch Pa in the main scanning direction is made equal to the dot pitch Pb in a sub-scanning direction. The sizes of the respective heating elements 50 are determined according to respective formulae A/a:B/b=1:α(α=0.6-1.0), A/a=β(β=0.8-1.2), A+C=Pa and B+C=Pb (wherein A is the perforation length in the main scanning direction, a is the length of each of the heating elements in the main scanning direction, B is the perforation length in the sub-scanning direction, b is the length of each of the heating elements in the sub-scanning direction, α is the perforation ratio in the sub-scanning direction with respect to that in the main-scanning direction, C is the gap length of the plate non-making part between the dot perforations in the main scanning direction and the sub-scanning direction).
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Inventors:
OKUMURA TAKASHI
Application Number:
JP16030492A
Publication Date:
August 06, 1997
Filing Date:
May 27, 1992
Export Citation:
Assignee:
BURAZAA KOGYO KK
International Classes:
B41C1/14; B41J2/345; B41J3/24; B41C1/055; (IPC1-7): B41J2/345; B41C1/055
Domestic Patent References:
| JP2155739A | ||||
| JP471847A | ||||
| JP443035A | ||||
| JP4265759A |