Paper sensor device
AssigneeSharp Kabushiki Kaisha
InventorYUSUKE SAKAKIBARA
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Abstract
The present invention has a purpose of providing a paper sensor device capable of measuring measurement light with high precision to detect a paper property with high precision without adding to printing time. A paper sensor device includes: a light-emitter that emits emission light; a photodetector that receives emission light in a first state and receives light transmitted through a sheet of paper in a second state; and a transporting unit that transports the sheet of paper. The transporting unit, including a transport roller and a paper guide, transports the sheet of paper while sandwiching the sheet of paper between the transport roller and the paper guide. The light-emitter is embedded in the transport roller. The photodetector is disposed on the back of the paper guide to receive light via a window.
Claims18
A paper sensor device comprising:
- a light-emitter;
- a photodetector configured to receive measurement light projected by the light-emitter and then either transmitted or reflected by a sheet of paper, the paper sensor device detecting a paper property based on the measurement light;
- and
- a transporting unit configured to transport the sheet of paper while sandwiching the sheet of paper between a transport roller and an opposing member, either or both of the transport roller and the opposing member having a window on a sandwiching face thereof where the sheet of paper is sandwiched, wherein:
- the light-emitter projects light via the window(s) onto a sandwiched portion of the sheet of paper being transported;
- and
- the photodetector receives the measurement window(s).
Dependencies are inferred from the claim text.