Reciprocable imprinting apparatus.

摘要

An article marking apparatus (10) of the reciprocable impact type wherein an imprinting head (152) is driven from a rest condition is sealed engagement with an inking cartridge (106) through a ninety degree rotation to impact upon the surface of a passing article (43) whereby to imprint indicici information thereon by means of printing type (178) carried by said imprinting head (152). The imprinting head (152) is pivotally coupled to a pneumatic drive device (224) by a linkage (190, 192, 198). A guide in the form of a cam slot (212) and follower (206, 204) arranged is provided to define the path taken by the head (152). The cam and follower arrangement is arranged so that the velocity of rotation of the imprinting head means during an imprinting stroke is uniform at the locations proximate the ends of the strokes, with the velocity of rotation increasing in accordance with uniform rotational acceleration to the midpath of the strokes and decreasing under uniform deceleration to locations proximate the end of the strokes. This prevents shaking and/or misalignment of the imprinting head.