Cutting – Rotatable disc tool pair or tool and carrier – Tool pair comprises rotatable tools
Reexamination Certificate
1998-08-25
2001-09-11
Young, Lee (Department: 3724)
Cutting
Rotatable disc tool pair or tool and carrier
Tool pair comprises rotatable tools
C083S499000, C083S508100
Reexamination Certificate
active
06286404
ABSTRACT:
The present invention relates to equipment for cutting sheet material, for example paper or plastics material, comprising a plurality of pairs of blade units and counter-blade units slidable and fixable on respective elongate support members.
Cutting equipment of the type indicated above is used, for example, in winding-cutting machines, that is machines which can unwind a roll of the sheet material, for example paper or plastics film, cut it into several sections perpendicular to its axis and rewind the cut sections to form rolls of shorter axial extent than that of the starting roll.
The object of the present invention is to provide automatic cutting equipment in which it is possible to adjust the axial extent of the various sections cut from the starting sheet material rapidly and in a desired manner.
This object is achieved by equipment of the type indicated above characterised in that it includes:
a first positioning carriage which can move parallel to the elongate supporting member of the counter-blade units and which has means for selectively engaging the counter-blade units and means for locking the units selectively relative to the elongate support member,
a second positioning carriage which can move parallel to the elongate support member of the blade units and which has means for selectively engaging the blade units and means for locking the units selectively relative to the elongate support member,
drive means which can drive the first and second carriages to move uniformly and in synchronism with each other,
means for detecting the axial position of at least one of the carriages, and
a control unit for controlling the drive means, the selective engagement means and the selective locking means.
In the equipment of the invention, the positioning of the various blade and counter-blade units is achieved by the two carriages which, at any particular time, locate them at the desired positions along the respective elongate support members by means of a series of operations of unlocking, longitudinal movement and locking. These operations are controlled by the control unit which has previously been programmed appropriately and which continuously receives signals output by the detector means in order to effect any adjustments necessary to ensure that the actual positions of the blade and counter-blade units conform with the desired positioning.
Thus, once the various blade and counter-blade units have been positioned and the cutting operation is started, it is possible for the starting sheet material to be cut into strips of the desired widths.
The equipment of the invention also has the advantage that it does not require the removal of the roll of sheet material, which must subsequently be cut, from the associated winding-cutting machine during the period in which the positions of the blades and counter-blades are adjusted.
REFERENCES:
patent: 3376774 (1968-04-01), Collins
patent: 3491632 (1970-01-01), Dovey
patent: 3886833 (1975-06-01), Gunn et al.
patent: 4237761 (1980-12-01), Coburn
patent: 4676133 (1987-06-01), Fujimura
patent: 4781668 (1988-11-01), Mowry
patent: 4859085 (1989-08-01), Buessinger et al.
patent: 5025693 (1991-06-01), Tidland
patent: 5170688 (1992-12-01), Keech et al.
patent: 5325753 (1994-07-01), Schusler et al.
patent: 4424197A1 (1986-01-01), None
patent: 4224010A1 (1993-02-01), None
patent: 29504644.9 (1995-07-01), None
patent: 0 258 442 (1988-03-01), None
patent: 0444612A1 (1991-09-01), None
patent: WO96/28284 (1996-09-01), None
PCT/EP97/00958 International Search Report.
Miglietta Maurizio
Myers Bigel Sibley & Sajovec P.A.
Smith Sean
Young Lee
LandOfFree
Cutting equipment with automatic positioning apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cutting equipment with automatic positioning apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cutting equipment with automatic positioning apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2446095