Seikosha Co., Ltd.

Seiko Precision Inc.

Fumio Otsuka

Akio Tajima

Hiroyuki Harada

Mikio Hayashi

Takeshi Matsumoto

Koichi Kimura

Yoshihiro Ohno

Yuji Nakagaki

Noriyuki Kurokawa

Masami Nojima

The present invention is intended to facilitate the replacement of printing types and to eliminate mistakes in the replacement thereof. A printing type wheel 2 and a stock wheel 3 are coaxially arranged. The printing type wheel 2 is provided with an attachment part for inserting and attaching a printing type unit 5 for printing on an object F to be printed. The printing type unit 5 is detachably stocked in the stock wheel 3. The printing type unit 5 is taken out from the stock wheel 3 with a robot 6 so as to be attached on the printing type wheel 2. Ink is deposited to the printing type unit 5 attached on the printing type wheel 2 with an ink roller 45. The printing type wheel 5, the stock wheel 3 and the ink roller 45 are warmed with the heater 30 and the heater 46.

Printing type printer

A paper cassette used in a printer for holding sheets of paper. The cassette comprises a case holding sheets of paper and corner claws mounted at both sides of the front end of this case. The claws engage the front ends of the corners of the uppermost sheet of paper. The claws have front walls which are inclined upwardly toward the direction in which the uppermost sheet is fed. The front walls are also inclined from the front end of the uppermost toward the direction in which the walls are distant from the front end of the sheet by slow degrees toward the inside of the widthwise of the sheet. When the uppermost sheet is curled, the corners of the front end of the sheet are disengaged from the corner claws certainly.

Paper cassette having inclined corner claws

A paper feeding system that eliminates a mechanism for interrupting driving force to picking rollers to lower the cost of the system and to secure the feeding of papers. Corner nails are supported in a manner displacable up and down on the both sides of the front end portion of a paper cassette and the front corner portions of papers stored within the paper cassette can be anchored by the corner nails. A projecting part of the corner nails abuts to a stopper to restrict its upper limit position. When the paper is not fed, the picking rollers are in an up position and are separated from the paper and the corner nails retain the paper at a certain height position engaging with the front corner portion of the paper. When the paper is fed, the picking rollers go down to a down position to press the paper against biasing force of a bias spring and the corner nails are separated from the stopper and contact with the front corner portion of the paper in the down position.

Paper feeding system and picking system used therefor

Printing head for a printer

A serial printer includes a reciprocably mounted carriage having a printing head, and a generally flat flexible cable extends between the carriage and a drive circuit. A generally flat flexible reinforcing plate comprising a shield electrode is disposed in superimposed relationship to the flexible cable.

Serial printer

A printing head includes a plurality of printing levers, each having a front end portion and a rear end portion, with each printing lever being rotatable about its rear end portion. An electromagnetic drive is operable to individually drive the printing levers in a driving direction so as to apply a printing force to printing elements operated by the printing levers. Resilient springs operatively associated with the printing levers resiliently apply a return force to each of the printing levers in a return direction opposite to the driving direction. Stopper devices are disposed to be operatively engaged by each of the printing levers upon application of the printing force to thereby preclude contact between each of the printing levers and the electromagnetic drives upon application of the printing force.

Printing head of the impact type

An inpact dot printer has a ribbon cassette the casing of which is made of plastic. A leaf spring is mounted in the casing so as to be resilient contact with the inked ribbon in the cassette. An element protrudes from the spring to the outside of the casing, and is located at a position where it is in resilient contact with either a carriage of conductive material or a metal part secured to the carriage when the ribbon cassette is installed in position on the carriage. When the printer effects printing operation, static electricity generated on the ribbon is carried away to ground via the protruding element and other components.

Dot printer having means for discharging static electricity from the ink

An ink ribbon cassette for a printer includes a ribbon storage chamber in which an endless ink ribbon is stored. The ribbon has a portion lying outside the chamber, and is movable out of and into the chamber by a feed roller. A roller is provided in the vicinity of the ribbon outlet of the chamber. A spring is provided adjacent to the chamber for holding the ribbon against the roller to impart tension to the outwardly lying ribbon portion. A lever contacts the spring, and is rotatable to deform the spring so that the spring may hold the ribbon against the roller with an increased force.

Growing community of inventors

Tokyo, Japan

Fumio Otsuka