Image forming apparatus using thermal print head
First Claim
Patent Images
1. An image forming apparatus, comprising:
- a printing unit having a thermal printing head to print an image by applying heat onto a medium, and a platen roller facing the thermal printing head to support the medium;
a conveying unit to convey the medium at a predetermined printing speed; and
a guide roller disposed between the conveying unit and the printing unit to guide the medium, the guide roller having a curved portion formed in a width direction of the medium.
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Abstract
An image forming apparatus using a thermal printing head, the image forming apparatus including a printing unit having a thermal printing head to print an image by applying heat to a medium and a platen roller facing the thermal printing head to support the medium, a conveying unit to convey the medium at a predetermined printing speed, and a guide roller disposed between the conveying unit and the printing unit to guide the medium, the guide roller having a curved portion formed in a width direction of the medium.
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Citations
22 Claims
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1. An image forming apparatus, comprising:
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a printing unit having a thermal printing head to print an image by applying heat onto a medium, and a platen roller facing the thermal printing head to support the medium;
a conveying unit to convey the medium at a predetermined printing speed; and
a guide roller disposed between the conveying unit and the printing unit to guide the medium, the guide roller having a curved portion formed in a width direction of the medium. - View Dependent Claims (2, 3, 4, 5)
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6. An image forming apparatus, comprising:
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a printing unit including a thermal print head to form an image on a medium as the medium is conveyed therethrough and to heat the medium according to image information; and
a guide unit to bias the medium along a widthwise direction as the medium is being conveyed so that a curvature of the width of the medium corresponds with a curvature of a line in which the image information is heated. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A conveying unit useable in an image forming apparatus having a thermal print head, the conveying unit comprising:
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a conveying member to convey a printing medium to and from the thermal print head; and
a guide member to bias the printing medium along a widthwise direction as the medium is being conveyed so that a curvature of the width of the medium corresponds with a curvature of a heating line on the thermal print head.
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16. A method of printing an image using an image forming apparatus having a thermal print head, comprising:
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forming an image on a medium as the medium is conveyed through the thermal print head and heating the medium according to image information; and
biasing the medium along a widthwise direction as the medium is being conveyed so that a curvature of the width of the medium corresponds with a curvature of a line in which the image information is heated. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification