High speed interfolder
First Claim
1. An interfolding apparatus for interfolding sheets cut sequentially from a single web of material, the apparatus comprising:
- a knife roll rotatable about an axis and operable to cut successive sheets from a stream of the single web of material issuing from a source in a downstream direction;
a folding roll positioned downstream of the knife roll, the folding roll rotatable in a first direction at a first roll speed; and
an additional roll disposed adjacent to the folding roll and rotatable about an axis in a second direction at a second roll speed, the additional roll operable to receive the successive sheets and release the successive sheets in the downstream direction toward the folding roll;
wherein the folding roll and the additional roll define a nip therebetween, the successive sheets passing through the nip, and wherein the first roll speed of the folding roll is different from the second roll speed of the additional roll, the difference in speed between the folding roll and the additional roll operable to overlap adjacent portions of the successive sheets cut from the single web of material onto the folding roll.
3 Assignments
0 Petitions
Accused Products
Abstract
An interfolding apparatus including a knife roll rotatable about an axis and operable to cut successive sheets from a stream of web material issuing from a source in a downstream direction. A folding roll is positioned downstream of the knife roll and is rotatable in a first direction at a first roll speed. An additional roll is disposed adjacent to the folding roll and is rotatable about an axis in a second direction at a second roll speed. The additional roll is operable to receive the successive sheets and release the successive sheets in the downstream direction toward the folding roll. The folding roll and the additional roll define a nip therebetween, the successive sheets passing through the nip. The first roll speed of the folding roll is different from the second roll speed of the additional roll, the difference in speed between the folding roll and the additional roll operable to overlap adjacent portions of the successive sheets onto the folding roll.
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Citations
36 Claims
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1. An interfolding apparatus for interfolding sheets cut sequentially from a single web of material, the apparatus comprising:
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a knife roll rotatable about an axis and operable to cut successive sheets from a stream of the single web of material issuing from a source in a downstream direction; a folding roll positioned downstream of the knife roll, the folding roll rotatable in a first direction at a first roll speed; and an additional roll disposed adjacent to the folding roll and rotatable about an axis in a second direction at a second roll speed, the additional roll operable to receive the successive sheets and release the successive sheets in the downstream direction toward the folding roll; wherein the folding roll and the additional roll define a nip therebetween, the successive sheets passing through the nip, and wherein the first roll speed of the folding roll is different from the second roll speed of the additional roll, the difference in speed between the folding roll and the additional roll operable to overlap adjacent portions of the successive sheets cut from the single web of material onto the folding roll. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for interfolding sheets cut sequentially from a single web of material, the method comprising:
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issuing a single web of material in a downstream direction from a source; cutting with a knife roll the stream of web material into successive sheets following substantially the same path during interfolding; rotating an additional roll at a first roll speed; transferring each sheet to the additional roll; rotating a folding roll at a second roll speed; transferring each sheet to the folding roll; slowing the sheet with the folding roll, overlapping adjacent portions of the successive sheets onto the folding roll; and interfolding the overlapped sheets. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An interfolding apparatus, for interfolding sheets cut sequentially from a single web of material, comprising:
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a knife roll rotatable about an axis and operable to cut sheets from a stream of the single web of material issuing from a source in a downstream direction; a folding roll positioned downstream of the knife roll and adapted to receive the sheets, the folding roll rotatable in a first direction; and a lap roll adjacent the folding roll rotatable about an axis in a second direction, the lap and folding roll defining a nip therebetween; wherein the sheets are directly transferred from the lap roll to the folding roll to overlap adjacent portions of successive sheets cut from the single web of material onto the folding roll. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for interfolding sheets cut sequentially from a single web of material the method comprising:
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issuing a single web of material in a downstream direction from a source; cutting with a knife roll the stream of web material into successive sheets which successively follow substantially the same path during interfolding; transferring each sheet to a rotating lap roll; transferring each sheet directly from the lap roll to a rotating folding roll; overlapping a trailing edge of a first sheet with a leading edge of a second successive sheet on the folding roll; and interfolding the overlapped sheets. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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Specification