Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYu Izaki, Kenji Takagi
Life of this patent
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Abstract
An image forming apparatus includes an image forming unit configured to form a visible image and a bonding pattern on a sheet, and a bonding unit configured to heat a plurality of sheets in a stacked state, to bond the plurality of sheets together via the bonding pattern. The bonding pattern includes a first side portion, a second side portion, a third side portion, a first corner portion, a second corner portion, and a third corner portion. The second corner portion and the third corner portion are curved such that a minimum value of a radius of curvature of the second corner portion and a minimum value of a radius of curvature of the third corner portion are greater than a minimum value of a radius of curvature of the first corner portion.
Claims14
An image forming apparatus comprising:
- an image forming unit configured to form both a visible image and a bonding pattern on a sheet, the bonding pattern being formed of powder adhesive and to be used to bond sheets together;
- and
- a bonding unit configured to heat a plurality of sheets in a stacked state, to bond the plurality of sheets together via the bonding pattern,
- wherein the bonding pattern is a triangular-shaped pattern including a first side portion, a second side portion, a third side portion, a first corner portion connecting the first side portion and the second side portion, a second corner portion connecting the second side portion and the third side portion, and a third corner portion connecting the third side portion and the first side portion,
- wherein in a direction of a diagonal line passing a corner where a first edge and a second edge of the sheet intersect, the first corner portion is positioned on a near side to the corner of the sheet, and both the second corner portion and the third corner portion are positioned on a far side from the corner of the sheet, and
- wherein both the second corner portion and the third corner portion are curved such that a minimum value of a radius of curvature of the second corner portion and a minimum value of a radius of curvature of the third corner portion are greater than a minimum value of a radius of curvature of the first corner portion.
An image forming apparatus comprising:
- an image forming unit configured to form both a visible image and a bonding pattern on a sheet, the bonding pattern being formed of powder adhesive and to be used to bond sheets together;
- and
- a bonding unit configured to heat a plurality of sheets in a stacked state, to bond the plurality of sheets together via the bonding pattern,
- wherein the bonding pattern is a rectangular-shaped pattern including a first side portion, a second side portion, a third side portion, a fourth side portion, a first corner portion connecting the first side portion and the second side portion, a second corner portion connecting the first side portion and the fourth side portion, a third corner portion connecting the third side portion and the second side portion, and a fourth corner portion connecting the third side portion and the fourth side portion,
- wherein the bonding pattern is extended in a long and narrow shape along a first edge of the sheet,
- wherein the first side portion is extended along the first edge of the sheet,
- wherein in a direction in which a second edge of the sheet that intersects the first edge extends, the third side portion is positioned closer to a center of the sheet than the first side portion,
- wherein the third corner portion is curved such that a minimum value of a radius of curvature of the third corner portion is greater than both a minimum value of a radius of curvature of the first corner portion and a minimum value of a radius of curvature of the second corner portion, and
- wherein the fourth corner portion is curved such that a minimum value of a radius of curvature of the fourth corner portion is greater than both the minimum value of the radius of curvature of the first corner portion and the minimum value of the radius of curvature of the second corner portion.
Dependencies are inferred from the claim text.