US 5,193,923 AGranted

Automatically interchangeable type wheel type printing apparatus

AssigneeCanon Kabushiki Kaisha

InventorsHiroatsu Kondo, Hideo Saito

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Abstract

By the driving of drive means for the vertically moving member of a type wheel in one way and resiliently holding means for the type wheel, the type wheel is moved upwardly to a position suitable for printing with the vertically moving member of the type wheel by pivotal movement, whereafter the resilient holding of the type wheel by the resiliently holding means is released by the driving of the drive means in the other way, whereby only the vertically moving member of the type wheel is contained in a type wheel containing housing, and by the driving of the drive means in one way after the termination of printing, the type wheel is resiliently held on the vertically moving member of the type wheel by the resiliently holding means, whereafter by the driving of the drive means in the other way, the type wheel, with the vertically moving member of the type wheel, is contained in the type wheel containing housing.

Claims11

Dependent claims

An automatically interchangeable type wheel printer including:

a platen;
and
a carrier reciprocally movable along said platen;
said carrier having:
a type wheel container for housing a plurality of type wheels, said type wheel container being movably provided in said carrier for a type wheel selecting operation;
type wheel moving members for raising the type wheels to a printing position, with one of said type wheel moving members each corresponding to one type wheel for pivotally moving a corresponding type wheel between the printing position for printing and a home position in said container, said type wheel moving members each having at one end thereof an engaging portion engaged with its corresponding type wheel and having at the other end thereof a center of rotation and a drive force transmitting portion;
first drive means for rotating a selected type wheel moving member about its center of rotation, said first drive means having its drive force transmitted to said selected type wheel moving member through said drive force transmitting portion;
and
second drive means for rotatively driving the type wheel in the printing position, said second drive means having a restraining portion for restraining the type wheels moved to the printing position by said corresponding type wheel moving member.

6 more elements

Dependencies are inferred from the claim text.