Ink jet head, ink jet apparatus and wiping method therefor
AssigneeCanon Kabushiki Kaisha
InventorsToshio Kashino, Tsuguhiro Fukuda, Noribumi Koitabashi, Hiroshi Tajika, Atsushi Arai, Hiromitsu Hirabayashi
Life of this patent
Estimating the term…
Abstract
An ink jet recording head comprises: a discharge port plate forming a discharge port for discharging ink; an ink jet recording head body having a liquid path communicating with the discharge port; and a cover member for covering the entire surface of the discharge port plate except the peripheral area of the discharge port, and the end edges of the ink jet recording head body, the edges being opposed to each other.
Claims34
An ink jet apparatus using a head, said head having an ink chamber provided with a discharge energy generating element for generating energy for discharging ink, an opening surface having an opening communicating with said ink chamber, a discharge port forming member joined to said opening surface and having a discharge port provided corresponding to said opening, and a press member for covering a section of a surface of said discharge port forming member, excluding a portion of the surface on which at least said discharge port is provided, to maintain a connection of said discharge port forming member to said opening surface, wherein said portion is segmented by said discharge port into a narrow side and a wide side, said apparatus comprising a wiping member for wiping the surface of said discharge port forming member by relative movement with said head, wherein said wiping member wipes the surface of said discharge port forming member in a direction from said narrow side to said wide side.
An ink jet apparatus using a head, said head having an ink chamber provided with a discharge energy generating element for generating energy for discharging ink, an opening surface having an opening communicating with said ink chamber, a discharge port forming member joined to said opening surface and having a discharge port provided corresponding to said opening, and a press member for covering a section of said discharge port forming member excluding a section on which at least said discharge port is provided thereby forming a step between said discharge port forming member and said press member, to maintain a connection of said discharge port forming member to said opening surface, said apparatus comprising a wiping member for wiping a surface of said discharge port forming member by relative movement with said head, wherein said wiping member wipes the surface of said discharge port forming member in a direction toward an area where said step between said discharge port forming member and said press member does not exist.
An ink jet apparatus using a head, said head having a discharge port forming member having a surface with a discharge port for discharging ink, a discharge energy generating element for generating energy for discharging ink from said discharge port, and a press member being provided on said discharge port forming member and having an opening corresponding to said discharge port, wherein said discharge port forming member being segmented into a narrow side and a wide side by said discharge port, and said opening exposes a portion of the surface segmented by said narrow side and said wide side, said apparatus comprising a wiping member for wiping the surface of said discharge port forming member by relative movement with said head, wherein said wiping member wipes the surface of said discharge port forming member in a direction from said narrow side to said wide side.
A method for wiping a discharge port surface of an ink jet apparatus, the ink jet apparatus including a head, said head having an ink chamber provided with a discharge energy generating element for generating energy for discharging ink, an opening surface having an opening communicating with the ink chamber, a discharge port forming member joined to said opening surface having a discharge port provided corresponding to the opening, and a press member for covering a section of the discharge port forming member excluding a section on which at least the discharge port is provided, to maintain a connection of the discharge port forming member to the opening surface, the apparatus further including a wiping member for wiping a surface of said discharge port forming member by relative movement with the head, wherein a surface of the discharge port forming member has a narrow side and a wide side not covered by the press member, the narrow side and the wide side being segmented by the discharge port, said method comprising the step of:
- wiping the surface of the discharge port forming member with the wiping member from the narrow side to the wide side.
A method for wiping a discharge port surface of an ink jet apparatus, the apparatus including a head, said head having an ink chamber provided with a discharge energy generating element for generating energy for discharging ink, an opening surface having an opening communicating with the ink chamber, a discharge port forming member joined to said opening surface and having a discharge port provided in accordance with the opening, and a press member for covering a section of the discharge port forming member for excluding a section on which at least the discharge port is provided thereby forming a step between said discharge port forming member and said press member, to maintain a connection of the discharge port forming member to the opening surface, the apparatus further including a wiping member for wiping a surface of the discharge port forming member by relative movement with the head, said method comprising the step of:
- wiping the surface of the discharge port forming member with the wiping member in a direction toward an area where the step between the discharge port forming member and the press member does not exist.
A method for wiping a discharge port surface of an ink jet apparatus, the apparatus including a head, said head having a discharge port forming member having a discharge port for discharging ink, a discharge energy generating element for generating energy for discharging ink from the discharge port, and a press member being provided on the discharge port forming member and having an opening corresponding to the discharge port, the apparatus further including a wiping member for wiping a surface of the discharge port forming member by relative movement with the head, wherein the surface of the discharge port forming member has a narrow side and a wide side within the opening of the press member, the narrow side and the wide side being segmented by the discharge port, said method comprising the step of:
- wiping the surface of the discharge port forming member with the wiping member in a direction from the narrow side to the wide side.
An ink jet head comprising:
- a discharge port plate having a discharge port for discharging ink;
- a cover plate having a groove that forms a liquid path communicating with said discharge port when said cover plate is joined to a substrate;
- and
- a cover member contacting and pressing to the substrate at least a part of said discharge port plate excluding a portion corresponding to said discharge port, wherein said discharge port plate includes a first area integral with said cover plate and a second area adjacent to said first area, said first area and second areas being on opposite sides of said discharge port, and said cover member contacts a portion of said second area of said discharge port plate which is closer to said discharge port than a portion of said first area of said discharge port plate contacted by said cover member.
An ink jet head comprising:
- a discharge port plate having a discharge port for discharging ink;
- an ink jet head body having a liquid path communicating with said discharge port;
- and
- a cover member for contacting and pressing at least a part of said discharge port plate excluding a portion corresponding to said discharge port,
- wherein said discharge port plate includes a thick portion and a thin portion, said thick portion and said thin portion being on opposite sides of said discharge port, and said cover member contacting an area of said thin portion of said discharge port plate which is closer to said discharge port than an area of said thick portion of said discharge port plate contacted by said cover member.
An ink jet head according to claim 33, wherein said discharge port plate is treated with ink-repellent.
Dependencies are inferred from the claim text.