초록 ▼

A method and apparatus for producing blanks to form into cartons, boxes or the like from a continuous sheet, the carton having a substantially tubular shaped part which, in cross-section, has three or more sides, the blank including continuous, sequentially disposed portions which will provide carto

A method and apparatus for producing blanks to form into cartons, boxes or the like from a continuous sheet, the carton having a substantially tubular shaped part which, in cross-section, has three or more sides, the blank including continuous, sequentially disposed portions which will provide carton side parts and flap parts at one or both of the ends of the tubular carton side part at some or each of the side parts, the ends of the tubular carton part being closed by the flap parts. A sheet or blank of required shape is produced using a fixture with a longitudinal extension that corresponds to the longitudinal extension of the tubular carton part and has a cross-sectional outer profile which corresponds to the cross-sectional profile of the tubular carton part. An edge part of a material sheet of at least the required size for a blank is attached to the fixture preferably along a longitudinally extending corner part of the fixture, the corner part forming a demarcation line between two adjacent side parts of the carton blank and at which line the sheet is folded, and the side parts wrapped around the fixture in the tubular carton part configuration with flap parts which are a continuation of the carton side parts. The fixture can be used as a template when it is necessary to cut and remove excess parts of the sheet attached to and formed around the fixture.

대표청구항 ▼

A method for manufacturing a sheet blank, adapted to be folded to a carton, from a sheet of carton material, said carton comprising a substantially tubular carton part which, in cross-section, has at least three sides and which is constructed from a sheet blank with a continuous row of sequential ad

A method for manufacturing a sheet blank, adapted to be folded to a carton, from a sheet of carton material, said carton comprising a substantially tubular carton part which, in cross-section, has at least three sides and which is constructed from a sheet blank with a continuous row of sequential adjacent carton portions which will form side parts of the carton, which sheet blank further includes flap parts located at least at one of the two ends of the tubular carton part at least at some of the side parts, the flap parts being adapted to close the tubular carton part, said method comprising making a sheet blank (1′) of requisite configuration with the aid of a fixture (5) having a longitudinal extended shape, which corresponds to the longitudinal extended shape of the desired tubular carton part (2), and a cross-sectional outer profile which corresponds to the cross-sectional outer profile of the desired tubular carton part (2); by the steps of obtaining and mounting a sheet of carton material, of requisite size sufficient to make at least a sheet blank, on the fixture (5); the step of locating an edge part (8) of said sheet of carton material contiguous with a longitudinally extending corner part (9) of the fixture, said corner part (9) forming a demarcation line between two mutually adjacent side parts (4); the step of folding and wrapping the sheet of carton material around the fixture to form said desired tubular carton part and the contiguous flap parts (3), which form a continuation of said tubular carton part; and the steps of slitting and removing excessive parts of the sheet of carton material, while wrapped on the fixture, as necessary to make the final shaped sheet blank, while using the fixture as a template.