Apparatus for splicing the trailing end of a web from an exhausted supply roll to the leading end of a web from a new supply roll
First Claim
1. Apparatus for splicing the trailing end of a web from an exhausted supply roll to the leading end of a web from a new supply roll with the leading end having an outwardly facing adhesive, said apparatus comprising:
- a cutter cylinder having a single cutter adapted for cutting through a web;
a backing cylinder;
a longitudinal sector-shaped portion on the periphery of said backing cylinder and aligned parallel to the axis of said backing cylinder, with suction holes for retaining the leading end of the new web behind the severing cut;
a first tape-applying cylinder, adapted to carry a tape which is adhesive on one side, and to apply the adhesive tape to the two webs at their abutting cut edges as they pass between the first tape applying cylinder and said backing cylinder;
means to move said backing cylinder into engagement with the new supply roll;
means for accelerating said new supply roll, said cutter cylinder and said backing cylinder to the same peripheral velocity as said exhausted supply roll;
controlling means for controlling the rotation of said backing cylinder and said new supply roll, so that said adhesive means engages said backing cylinder at a position other than at said sector-shaped portion, whereby a length of said leading end of said web is wrapped around the periphery of said backing cylinder and cut from the web of the new roll; and
means for moving the cutter cylinder and the first tape-applying cylinder into and out of engagement with the common backing cylinder.
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Accused Products
Abstract
Apparatus for splicing the trailing end of a web from an exhausted supply roll to the leading end of a web from a new supply roll comprises a cutting mechanism consisting of a cutter cylinder having a single cutter and a backing cylinder and serving to make a transverse severing cut through both superimposed webs passed between said cylinders, one of which is provided in a longitudinal strip- or sector-shaped portion with suction holes for retaining the leading end of the new web behind the severing cut. The apparatus also comprises a tape-applying cylinder, which is adapted to carry a tape which is adhesive on one side, and to apply the adhesive tape to the two webs at their abutting cut edges as they pass between the tape-applying cylinder. An outwardly facing adhesive tape is secured to the leading end of the web from the new supply roll and the backing cylinder which is associated with the cutter cylinder is adapted to be rotated at a peripheral velocity that is equal to the velocity of the web from the exhausted roll and to be moved into engagement with the new supply roll, which is adapted to be accelerated to the same peripheral velocity. The backing cylinder constitutes also the backpressure cylinder associated with the tape-applying cylinder, and means are provided for moving the cutter cylinder and the tape-applying cylinder into and out of engagement with the common backing cylinder.
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Citations
11 Claims
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1. Apparatus for splicing the trailing end of a web from an exhausted supply roll to the leading end of a web from a new supply roll with the leading end having an outwardly facing adhesive, said apparatus comprising:
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a cutter cylinder having a single cutter adapted for cutting through a web; a backing cylinder; a longitudinal sector-shaped portion on the periphery of said backing cylinder and aligned parallel to the axis of said backing cylinder, with suction holes for retaining the leading end of the new web behind the severing cut; a first tape-applying cylinder, adapted to carry a tape which is adhesive on one side, and to apply the adhesive tape to the two webs at their abutting cut edges as they pass between the first tape applying cylinder and said backing cylinder; means to move said backing cylinder into engagement with the new supply roll; means for accelerating said new supply roll, said cutter cylinder and said backing cylinder to the same peripheral velocity as said exhausted supply roll; controlling means for controlling the rotation of said backing cylinder and said new supply roll, so that said adhesive means engages said backing cylinder at a position other than at said sector-shaped portion, whereby a length of said leading end of said web is wrapped around the periphery of said backing cylinder and cut from the web of the new roll; and means for moving the cutter cylinder and the first tape-applying cylinder into and out of engagement with the common backing cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification