Contact-type image sensor for reciprocally movable document sheet
AssigneeRohm Co., Ltd.
InventorHideki Sawada
Life of this patent
Estimating the term…
Abstract
A contact-type image sensor includes a case having an upper surface formed with an opening, a cover glass closing the opening and providing a linear reading region extending in the primary scanning direction. A sheet as an object to be read, coming into contact with the linear reading region, is reciprocally moved in the secondary scanning direction which is perpendicular to the primary scanning direction. The opening is defined by a pair of edges of the case spaced in the secondary scanning direction. Each of the edges includes a convex surface having a top positioned above the outer surface of the cover glass.
Claims11
A contact-type image sensor comprising:
- a case having an upper surface formed with an opening;
- a cover glass closing the opening and providing a linear reading region extending in a primary scanning direction;
- the linear reading region coming into contact with a sheet as an object to be read, the sheet being reciprocally movable in a secondary scanning direction which is perpendicular to the primary scanning direction;
- wherein the opening is defined by a pair of edges spaced in the secondary scanning direction;
- wherein each of the edges includes a convex surface having a top which is positioned above an outer surface of the cover glass;
- and
- wherein each of the edges includes a plurality of recesses that are open away from the cover glass for engagement with guide projections of a transfer base.
An image reading apparatus comprising:
- a transfer base having a transfer surface provided with guide projections upon which the sheet is transferred;
- and
- a contact-type image sensor placed in the transfer base;
- wherein the image sensor comprises:
- a case having an upper surface formed with an opening;
- a cover glass closing the opening and providing a linear reading region extending in a primary scanning direction;
- the linear reading region coming into contact with a sheet as an object to be read, the sheet being reciprocally movable in a secondary scanning direction which is perpendicular to the primary scanning direction;
- wherein the opening is defined by a pair of edges spaced in the secondary scanning direction;
- wherein the top of each of the edges is positioned above an outer surface of the cover glass and the transfer surface;
- and
- wherein each of the edges includes a plurality of recesses that are open away from the cover glass for engagement with the guide projections of the transfer base.
An image reading apparatus comprising:
- a transfer base having a transfer surface upon which the sheet is transferred;
- and
- a contact-type image sensor placed in the transfer base;
- wherein the image sensor comprises:
- a case having an upper surface formed with an opening;
- a cover glass closing the opening and providing a linear reading region extending in a primary scanning direction;
- the linear reading region coming into contact with a sheet as an object to be read, the sheet being reciprocally movable in a secondary scanning direction which is perpendicular to the primary scanning direction;
- wherein the opening is defined by a pair of edges spaced in the secondary scanning direction;
- wherein the top of each of the edges is positioned above an outer surface of the cover glass and the transfer surface;
- and
- wherein the transfer surface is provided by upper surfaces of guide projections which are spaced at a predetermined interval in the primary scanning direction and extend in the secondary scanning direction.
Dependencies are inferred from the claim text.