Abstract: A duplex printing apparatus is equipped with: a first printing section for printing on first sides of sheets; a storage section for storing a plurality of the sheets, the first sides of which have been printed on; a second printing section for printing on second sides of the sheets; a first conveying section for sequentially conveying the sheets, the first sides of which have been printed on, to the storage section; and a second conveying second for sequentially conveying the plurality of sheets which are stored at the storage section to the second printing section. The storage section is equipped with a holding mechanism that holds the plurality of sheets, the first sides of which have been printed on, in an overlapped state with predetermined intervals therebetween.

Abstract: In a negatively chargeable toner having i) negatively chargeable toner particles containing at least a binder resin, a colorant and a vinyl copolymer and ii) an inorganic fine powder, the negatively chargeable toner has a weight-average particle diameter of from 4 ?m to 12 ?m and contains, in particle size distribution of the toner, less than 50% by volume of particles of 10.1 ?m or more in particle diameter, and the vinyl copolymer is a vinyl copolymer obtained by copolymerizing a monomer composition which contains at least i) a vinyl monomer such as an N-substituted acryl- or methacrylamide or a ring-structure acryl- or methacrylamide and ii) a vinyl monomer having as a functional group a carboxyl group or a carboxyl group made into salt structure. An image-forming method and a process cartridge make use of such a negatively chargeable toner.

Abstract: A system for manufacturing two-way mailers constituted by a single blank imprinted with data on both faces thereof, the blank then being formed into superposed panels that not only define pre-addressed forwarding and return envelopes but also a printed statement of charges and a return stub to accompany payment, thereby making it possible for a company to forward to a customer a statement of charges and for the customer to remit to the company. In the system, the blanks are individually printed on both faces thereof in a printing stage that includes a conveyor loop wherein fresh blanks admitted into the loop are fed under the printing head for imprinting on one face thereof, each blank then being turned over and advanced on the loop toward a two-position output gate. In its first position, the gate passes the blank into a reentry mechanism acting to readmit the turned-over blank into the loop for imprinting on the other face thereof.