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1. 发明专利

DE3788258T2 未知
公开(公告)号：DE3788258T2
公开(公告)日：1994-03-17
申请号：DE3788258
申请日：1987-09-15
申请人： SHINKO ELECTRIC CO LTD
发明人： MITSUSHIMA SUSUMU C O SHINKO E , KAWANO JUNJI C O SHINKO ELECTR , IWATA SATOSHI C O SHINKO ELECT
IPC分类号： B41J2/325 , B41J2/36 , B41J2/365
摘要： A thermal transfer type printer comprising: (a) memory means (15,16) for storing print data corresponding to the desirable dot pattern and first and second current-on time data, each of the first and second current-on time data representing data of specific current-on time characteristics designating a relation between the current-on time and the surrounding temperature of the thermal head (6), the value of the first current-on time data being set higher than the value of the second current-on time data; (b) temperature detecting means (10) for detecting the surrounding temperature of the thermal head and outputting temperature data corresponding to detected surrounding temperature of the thermal head; and (c) thermal head control means (11,17,18) for controlling the temperature of the thermal head by varying the current-on times of the heating cells (TH1 and THn) based on the print data and a control signal, the print data selecting heating cells to be heated, the control signal selecting one of the first and second current-on time data stored in the memory means so that an optimum current-on time is read from the current-on time characteristics corresponding to selected current-on time data based on the temperature data, and the power being supplied so as to heat the heating cells selected by the print data for the optimum current-on time.

2. 发明专利

DE3881104D1 未知
公开(公告)号：DE3881104D1
公开(公告)日：1993-06-24
申请号：DE3881104
申请日：1988-06-17
申请人： SHINKO ELECTRIC CO LTD
发明人： IWATA SATOSHI C O SHINKO ELECT , ISHIYAMA KIYOSHIGE C O SHINKO
IPC分类号： B41J2/325 , B41J2/38 , B41J35/00 , B41J2/32 , B41J2/355 , B41J2/365
摘要： When a print line is printed on a printing paper by supplying a print current (C101 to C104) to a thermal head (4), heating elements (THa1 to THdn) within the thermal head and a transfer ribbon (13) are easily adhered together due to melted ink on surface of the transfer ribbon. Due to such adhering between the heating elements and the transfer ribbon, a white line is easily formed on a printing paper (14). In order to prevent such white line from being formed, the heating elements must be prevented from being cooled down after printing each print line. More specifically, in a period between a first time (t1) when each print line is completely printed and a second time (t4) when a printing paper is to be transported forward to a next print line, the heating elements are heated by relatively small heating value which is sufficient to melt a adhering portion formed between the heating elements and the transfer ribbon but which is insufficient to perform the printing. Thus, the heating elements are prevented from being adhered to the transfer ribbon, so that each print line can be printed with accuracy and without forming the white line.

3. 发明专利

DE3788258D1 未知
公开(公告)号：DE3788258D1
公开(公告)日：1994-01-05
申请号：DE3788258
申请日：1987-09-15
申请人： SHINKO ELECTRIC CO LTD
发明人： MITSUSHIMA SUSUMU C O SHINKO E , KAWANO JUNJI C O SHINKO ELECTR , IWATA SATOSHI C O SHINKO ELECT
IPC分类号： B41J2/325 , B41J2/36 , B41J2/365
摘要： A thermal transfer type printer comprising: (a) memory means (15,16) for storing print data corresponding to the desirable dot pattern and first and second current-on time data, each of the first and second current-on time data representing data of specific current-on time characteristics designating a relation between the current-on time and the surrounding temperature of the thermal head (6), the value of the first current-on time data being set higher than the value of the second current-on time data; (b) temperature detecting means (10) for detecting the surrounding temperature of the thermal head and outputting temperature data corresponding to detected surrounding temperature of the thermal head; and (c) thermal head control means (11,17,18) for controlling the temperature of the thermal head by varying the current-on times of the heating cells (TH1 and THn) based on the print data and a control signal, the print data selecting heating cells to be heated, the control signal selecting one of the first and second current-on time data stored in the memory means so that an optimum current-on time is read from the current-on time characteristics corresponding to selected current-on time data based on the temperature data, and the power being supplied so as to heat the heating cells selected by the print data for the optimum current-on time.

4. 发明专利

DE3881104T2 未知
公开(公告)号：DE3881104T2
公开(公告)日：1993-09-30
申请号：DE3881104
申请日：1988-06-17
申请人： SHINKO ELECTRIC CO LTD
发明人： IWATA SATOSHI C O SHINKO ELECT , ISHIYAMA KIYOSHIGE C O SHINKO
IPC分类号： B41J2/325 , B41J2/38 , B41J35/00 , B41J2/32 , B41J2/355 , B41J2/365
摘要： When a print line is printed on a printing paper by supplying a print current (C101 to C104) to a thermal head (4), heating elements (THa1 to THdn) within the thermal head and a transfer ribbon (13) are easily adhered together due to melted ink on surface of the transfer ribbon. Due to such adhering between the heating elements and the transfer ribbon, a white line is easily formed on a printing paper (14). In order to prevent such white line from being formed, the heating elements must be prevented from being cooled down after printing each print line. More specifically, in a period between a first time (t1) when each print line is completely printed and a second time (t4) when a printing paper is to be transported forward to a next print line, the heating elements are heated by relatively small heating value which is sufficient to melt a adhering portion formed between the heating elements and the transfer ribbon but which is insufficient to perform the printing. Thus, the heating elements are prevented from being adhered to the transfer ribbon, so that each print line can be printed with accuracy and without forming the white line.

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