Printing head structure of calculator having bold characters

Details Printing head structure of calculator having bold characters Printing head structure of calculator having bold characters

1996-12-06

1998-06-09

Burr, Edgar S.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including endless-band carrier for type-faces

101 9314, 400466, B41J 120

Patent

active

057624291

ABSTRACT:
A printing head structure of calculator, including a belt type printing head the outer periphery of which is disposed with at least one group of fine characters and at least one group of coarse characters. The fine characters have the same symbols and numerals as the coarse ones, while having different thicknesses and letterforms. By means of a printing control program of the calculator, the printing head is able to print out a positive or negative result respectively by fine characters or coarse characters so as to apparently visually distinguish the positive result from the negative one and thus achieve a reliably reminding effect.

REFERENCES:
patent: 3342128 (1967-09-01), Weitzner
patent: 3795186 (1974-03-01), Curtiss et al.
patent: 3845709 (1974-11-01), Gardiner
patent: 4218754 (1980-08-01), Schaeffer
patent: 4428285 (1984-01-01), Cole et al.
patent: 4611537 (1986-09-01), Hamisch, Jr.
patent: 5007748 (1991-04-01), Lee et al.
patent: 5152616 (1992-10-01), Kamijo

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