Abstract: The disclosure relates to a jigsaw puzzle having at least two puzzle parts wherein each of the mutually facing circumferential edge sections on both sides of the connecting region and remote from the latter is provided with at least one circumferential edge piece, along which the course of the circumferential edge is defined by the bisector of a two-dimensional angle which is formed between two straight lines which intersect on the bisector and by an upper end point of the associated one of the mutually facing circumferential edge sections of the two puzzle parts to an upper end point of an opposite circumferential edge of the same puzzle part such that when puzzle parts are joined together along mutually facing circumferential edge sections, contact between the two puzzle parts occurs exclusively on said circumferential edge pieces and in the region of the undercut.

Abstract: The disclosure relates to a jigsaw puzzle having at least one puzzle piece that can be bent along at least one predefined bending line, and that has an upper side and a lower side and a puzzle piece thickness extending between the upper side and the lower side which is reduced from an inner side of a bend along each bending line. In order to neutralise the resilient restoring force that acts in the bent state, on each side of each bending line there is a fixing device which releasably fixes a desired bending angle, each fixing device having at least one recess into which a corresponding protrusion engages in a clamping and/or latching manner when the puzzle piece is bent.

Abstract: The invention relates to a three-dimensional, self-supporting jigsaw puzzle, having a multiplicity of puzzle pieces resulting in a hollow body in the assembled state, each puzzle piece having an upper face associated with the exterior of the hollow body, a lower face associated with the interior of the hollow body, an edge extending between the upper face and the lower face, and at least one connecting region extending from the edge in the form of a recess or an extension.

Abstract: The disclosure relates to a jigsaw puzzle having at least one puzzle piece that can be bent along at least one predefined bending line, and that has an upper side and a lower side and a puzzle piece thickness extending between the upper side and the lower side which is reduced from an inner side of a bend along each bending line. In order to neutralise the resilient restoring force that acts in the bent state, on each side of each bending line there is a fixing device which releasably fixes a desired bending angle, each fixing device having at least one recess into which a corresponding protrusion engages in a clamping and/or latching manner when the puzzle piece is bent.

Abstract: The disclosure relates to a jigsaw puzzle having at least two puzzle parts wherein each of the mutually facing circumferential edge sections on both sides of the connecting region and remote from the latter is provided with at least one circumferential edge piece, along which the course of the circumferential edge is defined by the bisector of a two-dimensional angle which is formed between two straight lines which intersect on the bisector and by an upper end point of the associated one of the mutually facing circumferential edge sections of the two puzzle parts to an upper end point of an opposite circumferential edge of the same puzzle part such that when puzzle parts are joined together along mutually facing circumferential edge sections, contact between the two puzzle parts occurs exclusively on said circumferential edge pieces and in the region of the undercut.

Abstract: The invention relates to a three-dimensional, self-supporting jigsaw puzzle, having a multiplicity of puzzle pieces resulting in a hollow body in the assembled state, each puzzle piece having an upper face associated with the exterior of the hollow body, a lower face associated with the interior of the hollow body, an edge extending between the upper face and the lower face, and at least one connecting region extending from the edge in the form of a recess or an extension.

Abstract: A method for bonding together at least two sheets, in particular for producing a puzzle, of which a first sheet consists of cardboard or paperboard and a second sheet consists of paper or cardboard, comprises the steps of transporting the first sheet to a gluing station, applying a synthetic hot melt to the first sheet in the gluing station in the liquid state, bringing together the first sheet coated with the synthetic hot melt and the second sheet in an aligning station, and pressing the two sheets together to form a finished laminated product. The finished laminated product can be rapidly further processed and is distinguished by excellent flatness.