Medium supply apparatus
a technology of supply apparatus and cylinder, which is applied in the direction of thin material handling, transportation and packaging, function indicators, etc., can solve the problem of inability to avoid the curved roll sh
Inactive Publication Date: 2018-08-30
OKI DATA CORP
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- Application Information
AI Technical Summary
Benefits of technology
The present invention relates to a medium supply apparatus for a roll-shaped medium that can prevent the curved habit of the medium during transportation. The apparatus includes a holder, conveyance part, tension member, state switching part, and control unit. The tension member is positioned between the holder and conveyance part and can apply tension to the medium by contacting it. The state switching part can switch the tension member between a fixed state and a releasing state. The control unit can control the drive part, conveyance part, and state switching part. The apparatus can prevent the curved habit of the medium by allowing the tension member to apply tension to the medium when it is in a curved shape and then releasing it when the medium is in a linear shape. This improves the transportation of the medium and ensures smooth operation of the image forming process.
Problems solved by technology
It is impossible to avoid that the roll sheet is curved.
Method used
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> Configuration
[0020]FIG. 1 is a cross-sectional view showing a schematic configuration of a roll sheet supply device 100 as a medium supply apparatus according to an embodiment of the present invention. Hereinafter, the roll sheet supply device 100 according to the embodiment will be described from the upstream side in the transport direction E of roll sheet (continuous sheet). In FIG. 1, the conveying direction E of roll sheet (continuous sheet) is indicated by arrows. In FIG. 1, the upstream side in the conveying direction E is the right side in the drawing, and the downstream side in the conveying direction E is the left side.
[0021]The roll sheet supply device 100 according to the embodiment feeds a continuous sheet 101a from the roll sheet 101 formed of the continuous sheet (medium) 101a, which is wound in a roll form, and supplies the continuous sheet 101a to the printing device 200, which is an external apparatus. Note that the printing device 200 is an example of the externa...
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A medium supply apparatus supplying a rolled medium includes a tension member contacts to the medium to apply a tension to the medium, a state switching part that switches states of the tension member between first and second states, and a control unit. The tension member is swingable between a first position at which a first corner angle (θ1) and a second position at which a second corner angle (θ2) is formed, the second corner angle (θ2) being greater than the first corner angle (θ1). The control unit causes the state switching part to switch the state of the tension member to the fixed state in the first position when the medium is supplied, the control unit causes the state switching part to switch the state of the tension member to the releasing state in the first position when the control unit does not receive an image forming start signal for a predetermined period, and the control unit causes the state switching part to switch the state of the tension member to the fixed state when the tension member reaches the second position.
Description
TECHNICAL FIELD[0001]The present invention relates to a medium supply apparatus for supplying a medium which is wound into a roll shape.BACKGROUND[0002]A printer featuring a roll sheet guide member provided has been proposed (see patent number 1). In the printer, the roll sheet guide member guides the roll sheet to a roller, the roll sheet being pulled from a roll sheet support part. When performing a printing, the roll sheet guide member is advanced by a driving unit to a advancing position at which a roll sheet path is bent so that the roll sheet comes to contact with the roller for a predetermined length. When not performing the printing, the roller paper guide member is retrieved by the driving unit to a releasing position at which the roller paper is released. In the printer in patent document 1, the roller paper is prevented from having a curved habit (a curved portion) by retrieving the roll sheet guide member when not printing.RELATED ART[0003][Patent Document 1][0004]JP Lai...
Claims
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IPC IPC(8): B65H23/182B65H16/10B65H23/04
CPCB65H23/1825B65H16/10B65H23/048B65H23/16B65H23/185B65H2403/942B65H2404/147B65H2511/112B65H2511/212B65H2513/11B65H2553/51B65H2801/12B65H2513/10B65H2220/02B65H2220/01
Inventor TAKAHASHI, HIROMI
Owner OKI DATA CORP