UNIT FOR CONVERTING A CONTINUOUS WEB SUBSTRATE, AND PACKAGING PRODUCTION MACHINE THUS EQUIPPED
First Claim
1. A conversion unit for converting a first continuous web substrate into a second substrate in the form of separated converted blanks of predetermined length, and the web having a constant feed speed, the unit comprising in sequence:
- a first motorized arrangement engaging the web and configured and operable for producing a first run driving of the web;
a sheeter following the first arrangement and having rotary tools for cutting the web into the blanks;
a second motorized rotatable arrangement following the sheeter for producing a second run driving of the substrate, the second motorized arrangement being positioned in proximity to the sheeter; and
at least one station following the second motorized arrangement and having rotary tools for converting the blanks at the at least one station;
the second motorized arrangement being configured and operable to vary a speed of rotation of the second arrangement during a cycle of rotation of the rotary tools of the sheeter, wherein the cycle of rotation is variable and comprises;
a constant speed phase at a constant tangential speed, which is substantially equal to a speed of rotation of the tools of the sheeter, wherein a cut is made during the constant speed phase,a speed reduction phase, during which a length of the web, which is dependent on the difference between the length of the blank and an extension of the periphery of the rotary conversion tools, is kept upstream of the second motorized arrangement , anda speed increase phase, during which the substrate is discharged downstream of the second arrangement.
1 Assignment
0 Petitions
Accused Products
Abstract
A conversion unit converting a first continuous web substrate (2) into a second substrate in the form of converted blanks of predetermined length (3). On account of cutting tool rotation speed, the web (2) moves at various speeds for cutting the web cut lengths and other aspects of cutting and transport process having a constant input speed. The unit includes a first motorized arrangement (4) for producing a first run driving (F) of the web (2), a sheeter (12) having rotary tools (13, 14) for cutting the web into blanks (3), a second motorized arrangement (17) for producing a second run driving of the substrate (2, 3), the second arrangement being positioned in the immediate proximity of the sheeter (12), and at least one station (21, 22, 23) having rotary tools (26, 27, 28, 29, 32, 33) for converting the blanks (3). A speed of rotation (38, 41) of the second arrangement (17) varies during a cycle of rotation of the tools (13, 14) of the sheeter (12), comprising a phase at constant tangential speed (46), substantially equal to the speed of rotation of the tools (13, 14) of the sheeter (12), during which the cut is made, a speed reduction phase (43), during which a length of the web (2), dependent on the difference between the length of the blank (3) and an extension of the periphery of the tools (26, 27, 28, 29, 32, 33), is kept upstream of the second arrangement (17), and a speed increase phase (44), during which the substrate (2, 3) is discharged downstream of the second arrangement (17).
-
Citations
16 Claims
-
1. A conversion unit for converting a first continuous web substrate into a second substrate in the form of separated converted blanks of predetermined length, and the web having a constant feed speed, the unit comprising in sequence:
-
a first motorized arrangement engaging the web and configured and operable for producing a first run driving of the web; a sheeter following the first arrangement and having rotary tools for cutting the web into the blanks; a second motorized rotatable arrangement following the sheeter for producing a second run driving of the substrate, the second motorized arrangement being positioned in proximity to the sheeter; and at least one station following the second motorized arrangement and having rotary tools for converting the blanks at the at least one station; the second motorized arrangement being configured and operable to vary a speed of rotation of the second arrangement during a cycle of rotation of the rotary tools of the sheeter, wherein the cycle of rotation is variable and comprises; a constant speed phase at a constant tangential speed, which is substantially equal to a speed of rotation of the tools of the sheeter, wherein a cut is made during the constant speed phase, a speed reduction phase, during which a length of the web, which is dependent on the difference between the length of the blank and an extension of the periphery of the rotary conversion tools, is kept upstream of the second motorized arrangement , and a speed increase phase, during which the substrate is discharged downstream of the second arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification