Printing apparatus having discharge speed control
First Claim
1. A printing apparatus comprising:
- a paper discharge roller unit configured to transport a print sheet to a discharge port;
a transportation roller unit configured to transport the print sheet to the paper discharge roller unit;
a transportation speed determination unit configured to determine a transportation speed at which the transportation roller unit is driven; and
a paper discharge roller drive unit configured to drive the paper discharge roller unit at the transportation speed determined by the transportation speed determination unit during the time that the print sheet is being transported by the transportation roller unit, and then drive the paper discharge roller unit at a discharge speed which is determined independently from the transportation speed after the print sheet has left the transportation roller unit while the print sheet is being transported by the paper discharge roller unit, whereina print sheet sensor is provided between the discharge roller unit and the discharge port, and whereinthe paper discharge roller drive unit detects when the print sheet leaves the transportation roller unit on the basis of the detection result by the print sheet sensor, a distance between the transportation roller unit and a sensing position of the print sheet sensor, a length of the print sheet in the transportation direction, and the transportation speed determined by the transportation speed determination unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A printing apparatus comprises: a first paper discharge roller unit 411 and a second paper discharge roller unit 412 which are configured to transport a print sheet to a discharge port; a upper transportation roller unit 401 configured to transport the print sheet to the first paper discharge roller unit 411; a drive control unit 302 configured to determine a transportation speed; an upper side paper discharge drive unit 270 configured to drive both the paper discharge roller units at the determined transportation speed after starting transportation of the print sheet until the print sheet leaves the upper transportation roller unit 401, and drive both the paper discharge roller units at a discharge speed which is determined independently from the transportation speed until the print sheet leaves the second paper discharge roller unit 412.
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Citations
11 Claims
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1. A printing apparatus comprising:
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a paper discharge roller unit configured to transport a print sheet to a discharge port; a transportation roller unit configured to transport the print sheet to the paper discharge roller unit; a transportation speed determination unit configured to determine a transportation speed at which the transportation roller unit is driven; and a paper discharge roller drive unit configured to drive the paper discharge roller unit at the transportation speed determined by the transportation speed determination unit during the time that the print sheet is being transported by the transportation roller unit, and then drive the paper discharge roller unit at a discharge speed which is determined independently from the transportation speed after the print sheet has left the transportation roller unit while the print sheet is being transported by the paper discharge roller unit, wherein a print sheet sensor is provided between the discharge roller unit and the discharge port, and wherein the paper discharge roller drive unit detects when the print sheet leaves the transportation roller unit on the basis of the detection result by the print sheet sensor, a distance between the transportation roller unit and a sensing position of the print sheet sensor, a length of the print sheet in the transportation direction, and the transportation speed determined by the transportation speed determination unit. - View Dependent Claims (2)
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3. A printing apparatus comprising:
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a paper discharge roller unit configured to transport a print sheet to a discharge port; a transportation roller unit configured to transport the print sheet to the paper discharge roller unit; a transportation speed determination unit configured to determine a transportation speed at which the transportation roller unit is driven; and a paper discharge roller drive unit configured to drive the paper discharge roller unit at the transportation speed determined by the transportation speed determination unit during the time that the print sheet is being transported by the transportation roller unit, and then drive the paper discharge roller unit at a discharge speed which is determined independently from the transportation speed after the print sheet has left the transportation roller unit while the print sheet is being transported by the paper discharge roller unit, wherein a circulating transportation route is provided for causing the print sheet to circulate in a housing of the printing apparatus, and wherein the transportation speed determination unit determines the transportation speed to be equivalent to the discharge speed in the case where the print sheet is not circulated around the circulating transportation route. - View Dependent Claims (4, 5, 6)
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7. A printing apparatus comprising:
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a paper discharge roller unit configured to transport a print sheet to a discharge port; a transportation roller unit configured to transport the print sheet to the paper discharge roller unit; a transportation speed determination unit configured to determine a transportation speed at which the transportation roller unit is driven; and a paper discharge roller drive unit configured to drive the paper discharge roller unit at the transportation speed determined by the transportation speed determination unit during the time that the print sheet is being transported by the transportation roller unit, and then drive the paper discharge roller unit at a discharge speed which is determined independently from the transportation speed after the print sheet has left the transportation roller unit while the print sheet is being transported by the paper discharge roller unit, wherein a print transportation drive unit is provided for transporting the print sheet on which ink is sprayed, and wherein the transportation speed is determined to be higher than a speed of the print sheet which is transported by the print transportation drive unit during spraying ink on the print sheet. - View Dependent Claims (8, 9, 10, 11)
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Specification