Helical print head mechanism

Details Helical print head mechanism Helical print head mechanism

1980-05-29

1981-10-27

Sewell, Paul T.

Typewriting machines

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

Imprint by pivoting of type-head-carrier and type-head...

400165, B41J 140, B41J 752

Patent

active

042970423

ABSTRACT:
An impact printer head mechanism for printing on a print medium has a cylindrical print head with its axis perpendicular to the print line and a matrix of characters on its exterior surface in the form of a multi-turn helical row. A rotatably fixed screw thread cooperating with an internal screw thread on the print head is provided for supporting the print head for rotational and axial movement. A print head drive, including a gear cooperating with a spline on the print head, is provided for rotating the print head to simultaneously rotatably and axially move it to position a desired character relative to the print line. Operating means is provided for moving the print head relatively to the printing medium to cause a selected character to be printed.

REFERENCES:
patent: 447720 (1891-03-01), Wilder
patent: 548726 (1895-10-01), Seifried
patent: 734044 (1903-07-01), Cantelo
patent: 752795 (1904-02-01), Moya
patent: 2892031 (1959-06-01), Arko et al.
patent: 3085670 (1963-04-01), Paige
patent: 3739897 (1973-06-01), Pateuk et al.

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