Apparatus for controlling impression in a daisy wheel printer

Details Apparatus for controlling impression in a daisy wheel printer Apparatus for controlling impression in a daisy wheel printer

1979-06-15

1981-07-14

Pieprz, William

Typewriting machines

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

Including type-faces movable relative to type-face-carrier

101 9303, 4001573, 400166, B41J 126, B41J 160

Patent

active

042783577

ABSTRACT:
A daisy wheel spring disc utilized in conjunction with a daisy wheel print element to control impression. Both the spring disc and the print element have radially extending petals. The print element petals carry a character adjacent their outer extremity. A spring disc petal is associated with each print element petal for which impression is to be controlled. The spring disc petals vary in length relative to the print element petals. The lengths of the spring disc petals depend upon whether the character on the associated print wheel petal has a large or small print surface area. During printing, the spring disc is positioned on the printing side of the print element. When a print element petal is driven out of the plane of the remaining print element petals during printing of a character, the associated spring disc petal will be contacted and will absorb a portion of the energy imparted to the print element petal.

REFERENCES:
patent: 3970186 (1976-07-01), Sohl et al.
patent: 4119384 (1978-10-01), Keither
Sherba, "Uniform Pressure Printer", IBM Technical Disclosure Bulletin, vol. 4, No. 6. p. 9, 11/61.
Scott, "Uniform Pressure Printer", IBM Technical Disclosure Bulletin, vol. 4. No. 6, p. 10, 11/61.
Mathews, "Print Hammer Mechanism", IBM Technical Disclosure Bulletin, vol. 19, No. 9, pp. 3245-3246, 2/77.
Molloy, "Inhibiting Embossing on Impact Printers", IBM Technical Disclosure Bulletin, vol. 20, No. 10, pp. 3998-3999, 3/78.

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