Abstract: A graphic data processing apparatus including an input device for entering graphic data, a graphic data processing device for generating a visible pattern such as a drawing consisting of points represented by the graphic data, and lines connecting the points, and a display for displaying the generated pattern. The apparatus further includes a pattern data memory for storing pattern data representative of the visible pattern, an assessment data memory for storing assessment data for assessing the visible pattern, and a design assessing device for retrieving from the pattern data memory a portion of the pattern data which relates to at least one specified assessment item. The design assessing device operates to assess the portion of the pattern data against the assessment data, to determine whether the pattern data is adequate or not.

Abstract: A print head for a dot printer of the present invention includes a plurality of armatures which support a print wire on one end. A back stopper is provided on the rear side of the armatures to stop the armature as the print wire retreats after a print strike. The back stopper is provided with openings so that when an armature strikes the back stopper, upon withdrawal from the print strike, the noise emanated from the back stopper is reduced. A sound dampening piece may be abutted to the rear of the back stopper to further reduce the noise.