Method and apparatus for cutting a paper or foil web into variously-sized rectangles
OwnerOtto Bayinventor
Life of this patent
Estimating the term…
Abstract
Rectangular drawings of standard dimensions or formats can be automatically cut out of a continuous paper or plastic web (1) by a transverse cutter (9) and a plurality of longitudinal cutters (26), as directed by coding (20) on the edge of the web. The cut-off strips (23) of scrap made by transverse cutter (9) are directed away by a movable deflector (13). Additional deflectors (62) are provided downstream, in web motion direction D, of the longitudinal cutters (26) and serve to separate the scraps (23, 25) produced by the longitudinal cutters from the drawing forms (A0-A4) which have been trimmed on all four sides. Thus, manual separation of the drawings from the surrounding scrap is obviated.
Claims7
In a web-cutting machine having
- a sensor (5),
- a transverse cutter (9),
- deflector means (13, 62), and a plurality of longitudinal cutters (26) spaced across the web (1), a method of cutting variously-sized rectangular forms from said web, comprising the steps of
- sensing coding (20) disposed on an edge of said web,
- making at least one cut (22) transversely across the web (1) to separate off a piece having a length specified by said coding;
- actuating, in response to said coding (20), a first one of said deflector means, disposed downstream of said cut (22), thereby deflecting scrap (23) produced during said cut (22);
- selectively actuating at least one of said plurality of longitudinal cutters 926) and thereby producing a corresponding number of longitudinal cuts (24a, 24b, 24c) in said piece, in accordance with said coding and with a format defined thereby;
- and
- selectively actuating, in response to said coding (20), at least one of a plurality of second deflector means disposed downstream of said longitudinal cutters (26), thereby deflecting away scraps 25 produced during said longitudinal cuts.
A web-cutting machine, for cutting variously-sized form s from a web (1) bearing codes for control of cutting and at least one code for control of at least one deflector (13, 62) for deflection of scrap (23, 25, 86), having
- a sensor (5) reading cutting codes (20) from said web (1);
- a transverse cutting unit (9) making transverse cuts (22) completely across said web (1);
- a first deflector (13) downstream, in web motion direction (D), of said transverse cutting unit (9);
- a plurality of longitudinal cutting units (26) spaced across the web (1) and selectively movable between a cutting position and a non-cutting position;
- a set of second, independently movable deflectors (62) downstream of said longitudinal cutting units (26) for separation of scraps (23, 25, 86) from trimmed forms (65);
- and
- a control unit (CU) having an input connected to said sensor and outputs connected to said transverse and longitudinal cutting units (9, 26), controlling said cutting units in accordance with said codes (20).
Dependencies are inferred from the claim text.