Mikkelsen Graphic Engineering, Inc.

I-cut, Inc.

Esko-graphics Kongsberg As

Geo Andersen

Steen Mikkelsen

Peter Alsten

David G Jansson

A method and programmed apparatus for cutting graphics from substantially-identical sheets with graphics and registration marks printed thereon using a plotter and controlled cutter and sensor movable over the sheets, including: (1) sensing work-surface positions of the marks of a sheet and calculating an expected work-surface position for each such mark based on the work-surface positions of other marks of the sheet; (2) classifying each mark as active or inactive based on a first error criterion and applying the classification to corresponding marks of a subsequent sheet, the active marks being fewer than the total number of printed marks; (3) sensing the work-surface positions of the active marks of the subsequent sheet; and (4) cutting the graphics from the subsequent sheet based on the sensed positions of the active marks, thereby reducing the time for accurate cut-processing of the subsequent sheet.

Adaptive registration during precision graphics cutting from multiple sheets

A method and apparatus are disclosed for performing finishing operations on at least one graphics area on a graphics sheet, the graphics sheet having a graphics side, an opposite process side, and reference features, the graphics side bearing the graphics area(s) and registration marks in predetermined positions with respect to the graphics area(s). The method comprises positioning the graphics sheet on a sheet-receiving surface, sensing from the graphics side the positions of the registration marks, determining the coordinates of the graphics area(s) with respect to the sheet-receiving surface as if viewable from the process side, and performing finishing operations on the process side of the graphics sheet based on such determination, whereby such process-side finishing operations compensate for variations of the graphics area(s).

Automated method and apparatus for vision registration of graphics areas operating from the unprinted side

A method for preparing a graphic on a sheet of material which also includes at least one registration mark at and about the graphic in predetermined positions. The method involves the steps of applying the graphic and at least one registration mark on a sheet of material in positions according to layout data, transferring the layout data to a processing controller, placing the sheet of material on a sheet-receiving surface, sensing the position of the registration mark on the sheet of material, and utilizing the layout data and the position of the registration mark to precisely narrow-path-process around the graphic on the sheet of material. Certain embodiments use either (a) a subset of marks which is applied on one side of graphic or certain reference features, such as edges and corners of the sheet and elements of the graphic, to ascertain the position and orientation of the sheet on the apparatus.

Method for preparing graphics on sheets

A method and apparatus for cutting a graphics area from a sheet of material which includes such graphics area. The method involves applying a plurality of registration marks on the sheet at and about the graphics area in predetermined positions at the time the graphics are applied thereto, sensing the locations of the registration marks on the sheet of material at the time of cutting, and cutting the graphics area from the ready-to-cut sheet along a path determined in response to the sensed locations positions of the registration marks with respect to the graphics area at that time, whereby precise cutting occurs despite two-dimensional distortion of the sheet prior to cutting.

Method and apparatus for precision cutting and the like of graphics areas from sheets

An improved method and apparatus for cutting graphics areas from a sheet of material bearing a combination of graphics areas and a plurality of registration marks in predetermined positions with respect thereto, the combination being in a predetermined approximate position and orientation with respect to a set of reference features of the sheet. The method involves automatically determining whether the reference features are in an expected coordinate region on a sheet-receiving surface, and, if not, automatically determining the coordinate region of such features. Further steps then include sensing metrics of the reference features to determine the position and orientation of the sheet, inferring therefrom the approximate positions of the registration marks and then sensing the precise positions thereof with a main sensor, and cutting the graphics areas from the sheet in response to such precise positions.

Method and apparatus for rapid precision cutting of graphics areas from sheets

An improved method and apparatus for automatic cutting of graphics area(s) from a sheet of material which includes such graphics area(s), the graphics areas having a plurality of registration marks in predetermined positions with respect thereto and including a subset of the marks on no more than one side of the graphics area which are initial-position/orientation-determining marks. The method involves placing the sheet on a sheet-receiving surface, attempting to sense the subset in the field of view of a main sensor, and, when the subset is not in an expected location, automatically determining the coordinate region of the subset on the sheet-receiving surface and automatically repositioning the main sensor to the coordinate region such that the subset is within the field of view of the main sensor. Then the position and orientation of the sheet and approximate positions of the plurality of marks are determined based on sensing the subset, and thereafter their precise positions are sensed to guide cutting operations.

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Aabyhoej, Denmark

Geo Andersen