US 5,205,661 AGranted

Printer having continuous paper/cut paper changeover apparatus

AssigneeBrother Kogyo Kabushiki Kaisha

InventorHiroyuki Kato

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Abstract

The invention provides a printer where a continuous paper/cut paper changeover lever for changing over a continuous paper print mode and a cut paper print mode can be smoothly tuned so as to reduce a load on a drive mechanism and improve durability. A platen gear and a continuous paper/cut paper changeover lever at an end of a platen shaft, the platen gear is fitted to the outer periphery of the end of the platen shaft and fastened thereto by a pin. The continuous paper/cut paper changeover lever is fitted onto the outer peripheral portion of an extension portion of the platen gear. Engagement pawls of the continuous paper/cut paper changeover lever engage an engagement projection formed on a boss portion of the platen gear to be engageably held in a turnable manner relative to the boss portion of the platen gear.

Claims10

Dependent claims

A printer, comprising:

a frame;
a platen shaft rotatably supported on said frame;
a platen mounted on said platen shaft and extending in one direction;
a print head movable reciprocally in a longitudinally direction parallel to said platen to perform a print operation with respect to a print paper placed on said platen;
a paper feeder disposed in said frame;
a drive mechanism disposed in said frame and having a platen gear fittingly secured to the platen shaft and a gear train rotatably driving said paper feeder;
and
changeover means for connecting/disconnecting said paper feeder to/from said drive mechanism, wherein the platen gear is provided with an extension portion extending from one side surface toward the axial direction thereof and the changeover means comprises a continuous paper/cut paper changeover lever for changing over the state of said changeover means, lever being said continuous paper/cut paper changeover lever being supported on said extension portion of the platen gear in such a manner as to be turnable relative to the platen gear.

5 more elements

A printer, comprising:

a printer body;
a support chassis having two sides mounted in said printer body;
a platen shaft rotatably supported between said two sides of said support chassis;
a platen mounted on said platen shaft;
guide means mounted between said two sides parallel to said platen;
a print head mounted for reciprocal movement along said guide means;
a paper feeder for feeding continuous paper mounted between said two sides of said support chassis;
a drive mechanism mounted to one of said two side frames, said drive mechanism driving both said platen shaft and said paper feeder;
changeover means for connecting/disconnecting said paper feeder to/from said drive mechanism;
and
a platen gear secured to an end of said platen shaft providing a connection for said changeover means, said platen gear further comprising an extension portion extending axially along and around said platen shaft and said changeover means comprises a changeover assembly which is rotatably connected to said extension portion, said changeover assembly rotating independently of said platen and platen gear.

8 more elements

Dependencies are inferred from the claim text.