Abstract: A recording apparatus is advantageous in miniaturization even though a mechanism for adjusting a head gap is included. The recording apparatus includes a carriage for detachably holding a cartridge, a platen for supporting one surface of a recording medium, and a conveying roller and an eject roller for conveying the recording medium. The platen is constructed so that it is rockable with an axis of the eject roller as a rotation center and is switchable between at least two positions.

Abstract: An improved exchange system for a plate in a printing machine is described here, which comprises a unit box holding therein a plurality of plates each mounted to a fixture rod and capable of being disposed under a printing cylinder, said fixture rod having a slot adapted to engage with a fixture strip of the plate and a holding member for preventing the fixture strip from disengaging therefrom, and plate mount/dismount means disposed under said printing cylinder for mounting and dismounting the plate in said unit box onto and from said printing cylinder by the intermediary of said fixture rod.

Abstract: A novel printing press for printing a large number of different messages on sequentially fed stock, without requiring the use of a large printing drum, which also eliminates the requirement for collating. A multiplicity of drum segments are provided each having similar radii of curvature, for carrying printing type on their convex surfaces. A pressure wheel is located adjacent a pressure plate, the pressure wheel having a similar radius of curvature as each of the drum segments. The drum segments are carried each in turn around at least part of the pressure wheel between the pressure wheel and pressure plate, whereupon stock fed therebetween can be imprinted.