Abstract: Apparatus for temporary storage of successive portions of a continuous stream of paper sheets has a transporting unit which advances the stream along a horizontal path, a frame which defines for successive rotary cores an elongated guideway above the path, a two-armed lever which can support a fresh reel containing a supply of wound flexible band material at a level below the path, and chains which can transport successive cores from the inlet portion to the outlet portion of the guideway in parallelism with the path. The lever is indexible through 180 degrees and carries two spindles each of which can support a reel. The leader of the band on a reel on one of the spindles is attached to an empty core in the inlet portion of the guideway while a pawl intercepts the foremost sheets of the stream in the path and while the empty core is rotated by the belts of the transporting unit.

Abstract: Successive sheets of a stream of partially overlapping paper sheets are brought into contact with and are entrained by successive increments of an upwardly sloping running flexible band which is convoluted onto a rotary core to form with the sheets a bobbin wherein the sheets are confined between successive overlapping convolutions of the coiled band. The sheets of the stream are inverted ahead of the locus where they reach the running band so that the trailing portion of each preceding sheet overlies the leader of the next-following sheet. This reduces the likelihood of shifting of the sheets on impact against and during travel with the band upwardly toward the rotating core and renders it possible to dispense with a flexible element which is used in conventional apparatus to hold the sheets against slippage relative to the upwardly sloping band and which is convoluted with the band to thereby reduce the amount of space which is available in the bobbin for storage of confined sheets.

Abstract: A matrix usable for producing perforated nickel sleeves and the method for making the matrix. The matrix comprises a roller body and a sleeve detachably surrounding the roller body, the sleeve being provided with conductive and non-conductive portions. The mating surface between the roller body and sleeve is disclosed as frustum-shaped, and alternatively as a cylinder.