Abstract: An apparatus for printing letters, numerical characters and symbols in response to electronic data transmitted from a host machine onto both surfaces of a sheet of paper or film. Rollers move the sheet material along a path toward an outlet, a first printer prints on one of the surfaces of the sheet material within the path, and a second printer prints on the other surface of the sheet material within the path at a position nearer to the outlet than the first printer. A position detector detects the position of the sheet material within the path, and a controller concurrently and independently processes at least parts of the printing operations by the first and second printers based on the position detected by the position detector.

Abstract: An improved linerless pressure-sensitive label construction wherein label sheets carrying pertinent messages are pasted together with pressure-sensitive adhesive without using a release liner, and by separating the pasted-together label sheets, each separated section can be used as a label. Strips of release agent are provided at a given interval on the top and the bottom label sheets on their respective facing faces, the strips being arranged in a positionally staggered manner, so that the strips of release agent on one of the label sheets will come in contact with the strips of adhesive on the other.

Abstract: A process for preparing self-adhesive multilayered labels which comprises the steps of printing main and supplementary label messages on a label stock simultaneously by a label printer, cutting the label stock thus printed into halves, and then superimposing the halves of the label stock thus cut in a manner so that the face paper carrying the supplementary label message is releasably superimposed on and in alignment with the face paper carrying the main label message. After printing the main and supplementary label messages simultaneously in two parallel rows, the label stock is cut lengthwise into halves. One half of the label stock is peeled off its release paper and its face paper alone is forwarded on the conveyer line. The other half of the label stock is forwarded on the conveyer line together with its release paper.