A printer unit for selectively printing on documents fed between a matrix printer and a rotatable inked platen. The platen is actuably movable between a retracted position and an advanced print position. The document while being printed upon is moved at the same speed as the velocity of the periphery of the rotating platen. The document feed is limited by a feed control roller cooperating with a pressure roller. The feed control roller is coaxial with the rotatable platen and is adapted to move therewith between the retracted position and the print position. A solenoid is provided to move the feed control roller and platen between the two positions. The documents are permitted to pass through the print station unimpeded when the roller platen and feed control roller are retracted.

An endorser for use in document processing apparatus is provided with a matrix wire printer for printing variable information on documents as they are transported at a controlled speed along a transport path forming part of an endorsing station, and with a rotatable ink stamp driven by a controlled speed motor for printing fixed information on the documents in predetermined relationship with the variable information. A rotatably mounted endorser head assembly comprised of a velocity control member and an interrupted curvilinear platen, in addition to the ink stamp, is drivably rotated by the controlled speed motor to initially intercept and decelerate a document entering the endorsing station, and to thereafter print the fixed and variable information on the document. Deceleration of the document is accomplished by the velocity control member of the endorser head assembly in cooperation with a first biased back-up roller. The printing of the fixed information is accomplished by the ink stamp of the endorser head assembly in cooperation with a second biased back-up roller, and the printing of the variable information is accomplished by the matrix wire printer in cooperation with the curvilinear platen of the endorser head assembly. The ink stamp and curvilinear platen are continuously inked by a rotatable ink transfer member that is adjustably maintained in frictional contact with the ink stamp and the platen.

A system for mailing bulk mail pieces in which credit rating is relied upon instead of security to assure payment of the mail. A mailer user sends a batch of mail to the post office which is accompanied by a statement sheet indicating the number of mail pieces and amount of postage due. Accompanying this statement is a check in the amount of the postage required for the batch of mail.

A pocket-size check writing device is disclosed with a means for positioning a check form in a writing position having a number of predetermined writing types composed of individual symbol elements and with a manually operable device for actuating the writing type and reproducing the symbols of the writing type such that each writing type is constructed as a mosaic writing head with the symbol elements being independent of one another and individually controllable and being disposed in relating to one another such that they can be assembled in groups for the predetermined writing symbols in such a format that at each writing location one mosaic writing head is immovably disposed and has an arrangement whereby a keyboard reproduces the writing symbols and a control unit is provided which associates individual mosaic writing heads with an appropriate set of keys.

A control circuitry for operation of a matrix wire printer for impacting a continuously inked rotating platen for printing variable information onto transported documents moving between the printer and the platen. The platen carries a velocity control element for rotative cooperation with a bias roller to initially intercept and decelerate the document to a proper print speed prior to print initiation. Document position is transduced into a plurality of logic signals for commanding the individual actuation of successive columnar prints by the pin printer for printing a preselected message as stored in memory.