Rotary wheel type marking head

Details Rotary wheel type marking head Rotary wheel type marking head

1980-09-11

1982-02-09

Coven, Edward M.

Printing

Selective or progressive

Numbering

101 18, 101 29, 101110, B41J 144

Patent

active

043145051

ABSTRACT:
In a marking head having one or more marking wheels each rotated step-wise by a reciprocating actuating pawl engaged in successive circumferentially arranged recesses on the wheel and secured in marking position by a retainer pawl engaged under a spring bias successively in the recesses, improved structure wherein the recesses and retainer pawl have circumferentially spaced apart interengaged cam surfaces which permit circumferential shifting of the wheel induced by surface irregularities in a workpiece being marked and facilitate spring return of the wheel to centered position after the marking, each recess having a flat bottom engaged by a blunt flat end face of the actuating pawl, each recess having a flat rearwardly facing shoulder adjacent its forward cam surface engaged by a blunt forward face of the actuating pawl.

REFERENCES:
patent: 1062183 (1973-05-01), Martin
patent: 1385835 (1921-07-01), Kern
patent: 1407769 (1922-02-01), Premo
patent: 3421436 (1969-01-01), Patterson et al.
patent: 3482512 (1969-12-01), Jung
patent: 3541954 (1970-11-01), Speicher et al.
patent: 3840104 (1974-10-01), Groppini

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