Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
An electrophotographic printer having a transferring device for transferring a toner image from a photosensitive dram to a print area on a print medium, said transferring device operating in a constant-current control mode and then in a constant-voltage control mode after the constant-current mode, comprising: a calculating section for calculating a first distance between a leading edge of the print medium and a line to be first printed in the print area; and a controlling section for switching the transferring device from the constant-current control mode to the constant-voltage control mode when the print medium has been transported a second distance after the print medium arrives at the photosensitive drum, said second distance being shorter than said calculated first distance and varied in accordance with said calculated first distance.
Claim 2
Dependent Claim
129 words
An electrophotographic printer having a transferring device for transferring a toner image from a photosensitive dram to a print area on a print medium, said transferring device operating in a constant-current control mode and then in a constant-voltage control mode after the constant-current mode, comprising: a calculating section for calculating a first distance between a leading edge of the print medium and a line to be first printed in the print area; and a controlling section for switching the transferring device from the constant-current control mode to the constant-voltage control mode when the print medium has been transported a second distance after the print medium arrives at the photosensitive drum, said second distance being shorter than said calculated first distance and varied in accordance with said calculated first distance.
Claim 3
Dependent Claim
22 words
The electrophotographic printer according to claim 1, wherein said second distance is selected in accordance with a length of said first distance.
Claim 4
Dependent Claim
83 words
The electrophotographic printer according to claim 1, wherein said calculating section includes: a row counter for counting the number of lines of dots in the print area, said lines of dots extending in a direction perpendicular to a direction in which the print medium is transported; and wherein said controlling section determines a third distance between a leading edge of the print area and said line to be first printed in the print area on the basis of content of said row counter.
Claim 5
Dependent Claim
74 words
The electrophotographic printer according to claim 1, further including: a sensor for detecting a leading edge of the print medium being transported toward the photosensitive drum; and a position counter for counting a first time length required for the print medium to advance from where the print medium is detected by said sensor to a photosensitive drum, and for counting a second time length required for the print medium to advance said second distance.
Claim 6
Dependent Claim
42 words
The electrophotographic printer according to claim 4, wherein said transferring device is switched from the constant-current control mode to the constant-voltage control mode when said position counter has counted up a sum of said first time length and said second time length.
Claim 7
Dependent Claim
34 words
The electrophotographic printer according to claim 1, wherein said second time length is selected to have a predetermined ratio to a third time length required for the print medium to advance said first distance.
Claim 8
Dependent Claim
31 words
The electrophotographic printer according to claim 1, wherein said second time length is determined so that a difference between said second time length and said third time length is substantially constant.