Ink ribbon cassette

Abstract

The invention provides an ink ribbon cassette which enables a high printing quality by guiding a recording paper during printing by paper guide parts, eliminating a gap of a bite timing to a paper feed roller, and eliminating a shift of conveyance of the recording paper during printing. A ribbon outlet (4d), through which an ink ribbon (2) wound on a feeding reel passes, is provided near a first ribbon-receiving part (4) of an ink ribbon cassette (1) of the invention in a head insertion opening. A ribbon winding opening (7d), through which the ink ribbon (2) drawn through the ribbon outlet (4d) passes to be wound on a take-up reel (6), is provided near a second ribbon-receiving part (7) in the head insertion opening. A first paper guide (10) is provided at the ribbon outlet (7d) and a second paper guide (4e) is provided at the ribbon winding opening (4d) so that a recording paper to be fed is guided by the first and second paper guides (4e,10).

Description

technical field [0001] The present invention relates to an ink ribbon cassette, and more particularly, to an ink ribbon cassette having a paper guide portion capable of guiding recording paper before being pressure-contacted by a paper feed roller and a pressure contact roller. Background technique [0002] A conventional ink ribbon cassette (not shown) is attached to the printer main body 30 constituted by a thermal transfer printer. Further, the unused ink ribbon 31 is wound around a supply reel 32 on the left side of the drawing, and from the supply reel 32 is passed between a thermal head 34 (thermal head) and a platen roller 32 described later. so that it can be wound on the winding reel 33 on the right side of the figure. [0003] The thermal head 34 drawn by the ink ribbon 31 wound on the supply reel 32 is attached to a bracket 35 , and the bracket 35 is attached to the printer main body 30 via a spring 36 so as to be movable up and down. [0004] In addition, the r...

AI Technical Summary

Problems solved by technology

[0015] However, when the above-mentioned conventional ink ribbon cartridge (not shown) is installed in the printer main body 30, and the ink of the ink ribbon 31 is superimposed on the recording paper 37 to perform color printing, due to the high temperature of the thermal head 34 or the pressure contact The recording paper 37 is bent (especially warped upward) due to the pressure

[0016] The timing at which the front end of the recording paper 37 conveyed to the downstream side meshes with the second pressure contact roller during printing is deviated due to the bending of the recording paper 37, or the front end of the returning recording paper 37 is bent. High-precision detection of the contact 41b serving as the paper detection sensor 41

As a result, different colors of the ink ribbon 31 overlapped and printed on the recording paper 37 may cause color unevenness, resulting in poor printing.

Images