Compact printer
AssigneesCanon Kabushiki Kaisha, Canon Denshi Kabushiki Kaisha
InventorsSatoshi Watanabe, Toru Wakasawa, Hirofumi Hirano, Hiroshi Nishizawa
Life of this patent
Estimating the term…
Abstract
A compact printer having a typefont belt constituting a typefont wheel maintained under tension on a support, wherein the platen is rendered displaceable in a direction away from the typefont wheel after the completion of the printing operation, and the front end of a hammer provided in the typefont wheel is inclined upwards.
Claims12
A compact printer comprising a typefont wheel provided with printing types and an ink roller for applying printing ink to said printing types, said typefont wheel including a support, a plurality of typefont belts mounted on said support to define plural columns of printing types, each belt being made of an elastic member and having integrally formed on one side thereof a plurality of said printing types and on the other side thereof a plurality of positioning projections, each printing type being associated with a separate positioning projection and the printing types on adjacent typefont belts being arranged in a staggered fashion, said support having a plurality of apertures, wherein adjacent positioning projections on each typefont belt are spaced apart by a distance slightly less than the distance between corresponding apertures on said support, said projections being positioned within the apertures to mount each of said typefont belts on said support under tension over substantially the entire belt, and impact means disposed within said support and including at least one hammer dimensioned to impact types on a plurality of adjacent typefont belts from inside said support by striking the associated projections, wherein the staggered arrangement of types on adjacent typefont belts is such that at any time said hammer can only strike one projection of one of the adjacent typefont belts to transmit an impact force to the associated printing type thereby ensuring rapid and exact printing, and return of the one typefont belt to its original position without affecting the printing types of adjacent typefont belts.
A compact printer comprising a typefont wheel provided with printing types and an ink roller for applying printing ink to said printing types, said typefont wheel including a cylindrical support provided with a plurality of apertures about the periphery of said support, a printing hammer mechanism inside said support, and an elastic member connected to and extended along the outer circumference of said support, said elastic member being composed of a spring member formed of a bent wire material and having positioned therethrough at determined intervals the printing types so that after the printing hammer mechanism strikes any one of the printing types through the associated aperture, the struck type will be rapidly returned to its rest position, wherein said spring member is composed of meandering sections and conical spiral sections alternated at determined intervals, said meandering sections being molded in plastic material while said conical spiral sections serve to support said printing types.
A compact printer comprising a typefont wheel provided with printing types and an ink roller for applying printing ink to said printing types, said typefont wheel including a cylindrical support provided with a plurality of apertures about the periphery of said support, a printing mechanism inside said support, and a plurality of elastic members connected to and extended along the outer circumference of said support, said elastic members being provided with printing types arranged in columns with the printing types in adjacent columns arranged in staggered fashion and said printing hammer mechanism including at least one hammer having a width in the axial direction of said typefont wheel so as to strike printing types in a plurality of adjacent type columns, said elastic members each being composed of a spring member formed of a bent wire material and having positioned therethrough at determined intervals the printing types, wherein due to the staggered arrangement of printing types in adjacent columns at any given time the printing hammer can only strike one of the printing types in one of said adjacent columns through the associated aperture, the struck type then being rapidly returned to its rest position.
Dependencies are inferred from the claim text.