Abstract: A buckle folding machine with a plurality of parallel working rollers that are mounted together in a support that is rotationally mounted in the machine frame and that, via a drive, can be rotated for drawing in, folding, and ejecting the article to be folded, at least one of the rotating working rollers being displaceable, characterized in that the displaceable working roller as buckling roller (11) is a component of a radially movable buckling body (1) that can be tilted about a longitudinal axis that runs parallel to the working rollers (15, 16, and 17), the buckling body (1) cooperating with the adjacent working rollers (15, 16, and 17) for buckling the article (18) to be folded and for feeding it. to a folding gap and using at least one segment of a spreading cam (34) can be forcibly displaced into a position for permitting passage and into a position for buckling the article (18) to be folded.

Abstract: A buckle folding machine comprises a stationary machine frame (1) and four parallel working cylinders (3, 4, 5, 6) which have the same outside diameter and in pairs define at least two folding nips for the material to be folded and are adapted to be rotated at the same speed by a common transmission. It is proposed that the four working cylinders (3, 4, 5, 6) and the common transmission are arranged in the rotary frame (2), which is rotatably mounted in the machine frame (1) and is adapted to be rotated by a drive in order to draw in, fold and eject the material which is to be or has been folded. At least one of the working cylinders (3, 4, 5, 6) which revolve with the rotary frame is displaceable in said rotary frame. At least one of the working cylinders (3, 4, 5, 6) is adapted to be positively displaced within the rotary frame (2) by a mechanical control device.

Abstract: An apparatus for folding sheet material comprises a rotatable magazine comprising two folding plates having end edges extending parallel to each other for holding the sheet material with portions thereof projecting beyond the edges of the folding plates, and two folding rams wherebetween the rotatable magazine is mounted and which are displaceable with respect to each other, each folding ram having a substantially planar guide face facing the magazine and for guiding the projecting sheet material portions and cooperating with the end edges of the folding plates for bending the sheet material along the end edges upon rotation of the magazine. The magazine is rotatable 180.degree.