Seiko Epson Corporation

Nagamitsu Takashima

Ryoji Uesugi

Fujio Akahane

Kazushige Hakeda

Akiharu Kurebayashi

Koichi Saito

Katsunori Ono

Hideyuki Ogawa

Takahiro Katakura

Motonori Okumura

Kazuhiko Hara

Yasunori Koike

Yuji Tanaka

Kohji Watanabe

Yoshikatsu Yamamoto

Takaichi Wada

Katsumi Motojima

Munehide Kanaya

Hiroshige Owaki

Tsuyoshi Kitahara

Tatsuo Furuta

Takashi Nakamura

Norio Nomura

Hiroyuki Kamikura

Yasuto Kanai

Kazuyoshi Imai

Akio Horasawa

Dai Igarashi

Shinzo Saito

Itaru Yanokura

Hiroshi Hashizume

Nobuyuki Soma

Makoto Fujita

The invention is directed to a method of working a small recess portion. In the method, prior to press-forming small recess portions arrayed in a row by pressing a predetermined number of pieces of aligned male dies to a metal base plate, the metal base plate is previously formed with a highly rigid portion at a predetermined portion at a vicinity of an imaginary line extending in a row direction along end portions of predicted press portions to which the respective male dies are pressed.

Method of working small recess portion, method of fabricating liquid ejection head and liquid ejection head

A liquid ejecting head includes a head main body capable of ejecting a liquid supplied from a liquid storage unit, and a supply member provided with a liquid supply passage for supplying the liquid from the liquid storage unit to the head main body. The supply member has a filter mounting member provided with the liquid supply passage, a supply body that supplies the filter mounting member with the liquid, and a filter provided between the filter mounting member and the supply body. The supply member is provided with an outer portion that fixes the filter mounting member, the supply body, and the filter and that is formed by integral molding.

Liquid ejecting head, method for making the same, and liquid ejecting apparatus

An elastic member for an ink jet recording apparatus comprising a material containing 100 parts by weight of a block copolymer having a crystalline polyolefin block and an amorphous polyolefin block, 3 to 40 parts by weight of a polyolefin resin and 40 to 250 parts by weight of a softening agent.

Elastic member for ink jet recording apparatus, ink jet recording apparatus including elastic member, elastic member for ink tank and ink tank including elastic member

A male die for forming a member incorporated in a liquid ejection head is disclosed. Each of a plurality of first forging punches is operable to form a first recess on a metal plate. The first forging punches are arranged at a fixed pitch to form a punch row in a first direction. Each of a plurality of second forging punches is operable to form a second recess on the metal plate. The second forging punches are arranged adjacently to first forging punches located at both ends of the punch row. The first recess is to be a first part of the member which is used to eject liquid from the liquid ejection head, and the second recess is to be a second part of the member which is not used to eject liquid.

Forging punch, method of manufacturing liquid ejection head using the same, and liquid ejection head manufactured by the method

In order to manufacture a die for forming recesses in a metallic plate which are adapted to be pressure generating chambers in a liquid ejecting head, it is prepared a metallic block adapted to allow a plurality of dies arrayed in a first direction to be cut out, and having a flat end face extending in the first direction. The dies are cut out from the metallic block. A distance between a first part of each of the dies which is adapted to be working members for forming the recesses and the flat end face is made uniform.

Manufacturing method of die for manufacturing liquid ejecting head, and material block used in the same

An apparatus of fabricating a liquid ejection head is provided. The apparatus includes: a first die including projected streak portions aligned in parallel by a predetermined pitch and gap portions formed between the adjacent projected streak portions, wherein the first die is adapted to form the groove-like recess portions by pressing the projected streak portions to a metal plate; and a second die for supporting the metal plate to which the projected streak portions of the first die are pressed. Each of the projected streak portions includes: an inner wall forming portion for forming an inner wall of the corresponding groove-like recess portion extending in a depth direction of the corresponding groove-like recess portion; a connecting face portion; and an inclined face portion, continuous via the connecting face portion to the inner wall forming portion, for forming a bottom portion of the corresponding groove like recess portion into a substantially V-like shape.

Apparatus of fabricating and method of fabricating liquid ejection head, and liquid ejection head

A method of fabricating a liquid ejection head is provided. The method includes preparing a first die including projected streak portions aligned in parallel by a predetermined pitch and gap portions formed between the adjacent projected streak portions. The first die is adapted to form groove-like recess portions by pressing the projected streak portions to a metal plate. The method further includes preparing a second die for supporting the metal plate to which the projected streak portions of the first die are pressed. Each of the projected streak portions includes: an inner wall forming portion for forming an inner wall of the corresponding groove-like recess portion extending in a depth direction of the corresponding groove-like recess portion; a connecting face portion; and an inclined face portion, continuous via the connecting face portion to the inner wall forming portion, for forming a bottom portion of the corresponding groove-like recess portion into a substantially V-like shape.

A cylindrical rodis formed by bending sheet metalso as to bond together a pair of edgesandof the sheet metal. The cylindrical rodincludes therein (i) convex portionseach of which protrudes from the edgeand includes a sub-portion whose width is larger at a side thereof more distant from the edgethan at a side thereof less distant from the edge, and (ii) concave portionswhich are formed on the edge, have a shape complementary to the shape of the convex portions, and are fitted into the convex portions. A cylindrical rod which has high circularity and high linearity, in other words, which hardly has vertical and horizontal curves can be provided.

Cylindrical rod and method for manufacturing the same

An object is to provide a fine forging method for forming partitions of recesses precisely and forming recess shapes for pressure generation chambers etc. with high accuracy as well as a liquid ejection head that is produced by using the fine forming method. A fine forging method for forming groove-shaped recesses that are arranged at a prescribed pitch. After groove-shaped recesses are formed tentatively in a material plate by a first punch in which tentative forming punches are arranged, finish forming is performed on the tentatively formed groove-shaped recesses by using a second punch in which finish forming punches are arranged. An end portion of a projection strip is formed with slant faces or a slant face, whereby an end portion of each groove-shaped recess is formed precisely. A liquid ejection head produced by the above method exhibits stable liquid ejection characteristics and its manufacturing cost can be reduced by virtue of simplified working of forging.

Liquid ejection head having improved ejection performance

Method of working small recess portion

A punching apparatus forms a hole at a bottom portion of each of recesses which are formed in a metal plate in advance and arrayed in a first direction. A female die supports the metal plate. A male die is opposed to the recess and provided with a punch array in which a plurality of punches in the first direction. The male die is movable in a second direction perpendicular to the first direction to form the hole with each of the punches. The punches include first punches each having a distal end face which is slant in the second direction. A slant angle of the distal end face corresponds to a warp of the plate member due to the formation of the recesses.

Method of manufacturing a liquid ejecting head

A nozzle plate of the invention has nozzle opening including a taper partfor guiding ink in a pressure generation chamber and a straight pore partformed contiguous with the taper part.

Method of manufacturing a nozzle plate

A male die is adapted to be opposed to a first face of a metallic plate member. The male die includes a plurality of punches which are provided on the male die and arranged side by side in a first direction with a fixed pitch. A guide member is formed with a guide face which supports a side portion of the male die, at least when the punches are pressed into the plate member in a second direction, to form through holes therein.

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Nagano, Japan

Nagamitsu Takashima