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US 6,299,367 B1Granted
Coil spring sheet-pressing member for sheet feeding mechanism
AssigneeSeiko Epson Corporation
InventorsHideki Kawakami, Kenichi Hirabayashi
Life of this patent
Estimating the term…
Abstract
A sheet feeding mechanism includes a sheet feed roller for transporting a sheet along a paper transport path, and a sheet-pressing member disposed so as to press the sheet feed roller. The sheet-pressing member integrally includes a pressing portion which is formed by increasing the diameter of a part of a coiled portion of a compression coil spring.
Claims19
A sheet feeding mechanism for feeding a sheet along a transport path, comprising:
- a sheet feed roller;
- and
- a sheet-pressing member, disposed so as to press said sheet feed roller, said sheet-pressing member formed by an elastic wire, having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter.
A printer for printing on a sheet set therein, said printer comprising:
- a printhead;
- a sheet feed roller, disposed downward of said printhead when viewed in a sheet feeding direction, for feeding a sheet printed by said printhead in a predetermined direction;
- and
- a sheet-pressing member, disposed so as to press down said sheet feed roller, said sheet-pressing member formed by an elastic wire, having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter.
1 more element
A printer comprising:
- a printhead for printing characters on a sheet moving relatively to the printhead by ejecting ink drops through ink discharging orifices;
- and
- sheet pressing members, located near said discharging orifices, for pressing on the sheet at their positions not in contact with the ink of the characters immediately after printed, said positions being spaced apart from said ink discharging orifices, said sheet-pressing members formed by an elastic wire, having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter.
A printer for printing on a sheet set therein, said printer comprising:
- a printhead;
- a guide member disposed downstream of said printhead when viewed in a sheet feeding direction and in a side where said printhead is located with respect to said sheet, said guide member defining a part of a paper transporting passage;
- and
- a spring for guiding said sheet in a direction in which said sheet is apart from said guide member, said spring formed by an elastic wire, having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter.
1 more element
A printer comprising:
- a printhead for printing characters on a sheet moving relatively to the printhead by ejecting ink drops through ink discharging orifices;
- and
- a spring, located near said discharging orifices, for guiding said sheet in a direction in which said sheet is apart from said printhead, said spring being formed by an elastic wire, having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter.
A printer comprising:
- a printhead;
- a guide member disposed downstream of said printhead when viewed in a sheet feeding direction along a paper transporting passage, said guide member defining a part of said paper transporting passage;
- and
- a spring at least partially protruded into said paper transporting passage, said spring having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter.
1 more element
A paper guide for a sheet feeding mechanism, said paper guide comprising:
- a guide plate having a surface along which a sheet is to be transported;
- and
- a spring supported by said guide plate, said spring having a helix section with a generally constant diameter about a central axis, and at least one spiral section generally in a plane perpendicular to said axis and having an outer diameter greater than said constant diameter, said spiral section being partially protruded from said surface of said guide plate to be contactable with said sheet.
Dependencies are inferred from the claim text.