The invention relates to a measurement system for measuring at least an angle of the first plane through a first surface area of an object. The system includes a sensor arrangement for measuring the coordinates in a measurement coordinate system of a plurality of measurement spots on the first surface area. The measurement system further includes an inclinometer for measuring an inclination of the measurement coordinate system to the direction opposite to the direction of the force of gravity. The measurement system also includes a processing device for determining the angle of the first plane based on the measured coordinates of the plurality of measurement spots, the measured inclination from the inclinometer and the direction opposite to the force of gravity. The system may also measure the angle of the second plane.

Examples of a method for detecting misalignment cause a printer to print a calibration pattern on a recording medium sheet. The calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet (or to spaced positions along a line where folding of the recording medium sheet by a folding apparatus is intended to take place). When the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of the plural measurement scales are printed at the reference locations on the recording medium sheet.

Examples of a method for detecting misalignment cause a printer to print a calibration pattern on a recording medium sheet. The calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet (or to spaced positions along a line where folding of the recording medium sheet by a folding apparatus is intended to take place). When the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of the plural measurement scales are printed at the reference locations on the recording medium sheet.

The invention relates to a method for producing collections (15) from a plurality of N (N=2, 3, 4, . . . ) different printed products (11a-d), which collections (15) each comprise a stack (13) of printed products (11a-c), which stack is packed in a packaging element (11d) wrapped around the stack (13). A solution that does not require additional material use includes the following steps: providing the N printed products (11a-d): forming an intermediate stack (13) from Nx (x=1, 2, 3, . . . ) of the N printed products (10a-d); providing the x remaining printed products as a packaging element (11d); and wrapping the intermediate stack (13) in the packaging element (11d).

The invention relates to a method for producing collections (15) from a plurality of N (N=2, 3, 4, . . . ) different printed products (11a-d), which collections (15) each comprise a stack (13) of printed products (11a-c), which stack is packed in a packaging element (11d) wrapped around the stack (13). A solution that does not require additional material use includes the following steps: providing the N printed products (11a-d): forming an intermediate stack (13) from Nx (x=1, 2, 3, . . . ) of the N printed products (10a-d); providing the x remaining printed products as a packaging element (11d); and wrapping the intermediate stack (13) in the packaging element (11d).

An apparatus includes: a unit that provides an instruction on creasing and folding positions on paper set such that the distance between fold crease and fold line positions is meaningful; a unit that acquires a read image by reading paper that has been subjected to creasing and folding processes in accordance with the creasing and folding positions in an open state; a unit that analyzes the read image to detect two streaks corresponding to the fold crease and the fold line from the read image, and that specifies the position of one of the two streaks as the fold crease position and the position of the other as the fold line position on the basis of the creasing and folding positions; and a unit that outputs correction information about at least one of the creasing and folding positions such that the fold crease and fold line positions match each other.

A resin sheet material 2 in a state of being stretched in a longitudinal direction is held by a stretching and bending mechanism 3, and heated and softened by a heating unit 5. The softened resin sheet material 2 is stretched by pulling the ends in the longitudinal direction and ends in a transverse direction of the resin sheet material by the stretching and bending mechanism 3. The stretched resin sheet material 2 is bent by the stretching and bending mechanism 3, and molded by vacuum forming by a resin molding unit 6.

A sheet postprocessing apparatus includes a table configured to receive a plurality of sheets delivered thereto, and inclined downward toward a downstream side in a sheet delivery direction, a leading edge cursor provided on a far side on the table in the delivery direction, and configured to align respective leading edges of the sheets abutted against the leading edge cursor, and a postprocessing device including a stapling device that binds a central portion in the delivery direction, of the sheets stacked on the table, and a center folding device that folds the sheets along the central portion. The table includes an upper face region that allows the sheet to slide thereon, and a plurality of slip sheets of a belt-like shape, each extending on the upper face region along the delivery direction, with a clearance between each other in a width direction orthogonal to the delivery direction.

A sheet postprocessing apparatus includes a table configured to receive a plurality of sheets delivered thereto, and inclined downward toward a downstream side in a sheet delivery direction, a leading edge cursor provided on a far side on the table in the delivery direction, and configured to align respective leading edges of the sheets abutted against the leading edge cursor, and a postprocessing device including a stapling device that binds a central portion in the delivery direction, of the sheets stacked on the table, and a center folding device that folds the sheets along the central portion. The table includes an upper face region that allows the sheet to slide thereon, and a plurality of slip sheets of a belt-like shape, each extending on the upper face region along the delivery direction, with a clearance between each other in a width direction orthogonal to the delivery direction.

An image processing device includes: a fold unit that folds a first adjustment sheet including an adjustment pattern, over the adjustment pattern based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern with the first adjustment sheet folded by the fold unit unfolded; a position identifying unit that, based on a fold line in the image of the adjustment pattern read by the image reader, identifies a position of the fold line; and a position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position. The image reader includes a scanner that scans the first adjustment sheet relatively in a direction along fold of the first adjustment sheet, and reads the image of the adjustment pattern.