Method of and apparatus for splicing running webs of paper and the like
First Claim
1. A method of splicing the trailing end of an expiring running web to the leading end of a fresh running web, comprising the steps of:
- advancing the leading and trailing ends in at least substantial parallelism with and next to each other at an at least substantially identical speed and in a predetermined direction along a path flanked by a rotary arcuate knurling surface and a rotary counter-surface;
moving the knurling surface counter to said direction while maintaining the knurling surface out of contact with the webs in said path;
thereupon turning the knurling surface in said direction and simultaneously accelerating the knurling surface at least close to said speed; and
thereafter pressing the leading and trailing ends against each other by and between said surfaces.
1 Assignment
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Accused Products
Abstract
The leading end of a running fresh web of cigarette paper or the like is spliced to the trailing end of a running expiring web while the ends travel at the same speed, in the same direction and next to each other. The splicing unit includes a rotatable roll at one side of the path for the advancing ends, and a rotary carrier at the other side of such path opposite the roll. The carrier is provided with a segment having a convex knurling surface which cooperates with the peripheral surface of the roll to provide the webs with a splice while the segment engages the adjacent web. Prior to splicing, the carrier is rotated in a first direction to move the segment away from the path for the webs, and such movement is followed by rotation of the carrier in a second direction to accelerate the knurling surface at least close (a) to the common speed of the webs and (b) at least close to the speed of the peripheral surface of the roll. Those remnants of the webs which project beyond the splice are separated from the webs, preferably by tearing.
17 Citations
33 Claims
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1. A method of splicing the trailing end of an expiring running web to the leading end of a fresh running web, comprising the steps of:
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advancing the leading and trailing ends in at least substantial parallelism with and next to each other at an at least substantially identical speed and in a predetermined direction along a path flanked by a rotary arcuate knurling surface and a rotary counter-surface;
moving the knurling surface counter to said direction while maintaining the knurling surface out of contact with the webs in said path;
thereupon turning the knurling surface in said direction and simultaneously accelerating the knurling surface at least close to said speed; and
thereafter pressing the leading and trailing ends against each other by and between said surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. Apparatus for splicing the tailing end of an expiring running web to the leading end of a fresh running web while the leading and trailing ends advance next to each to other, in the same direction and at an at least substantially identical speed along a predetermined path, comprising:
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a rotary splicing member adjacent one side of said path and having a web knurling surface;
regulatable drive means for said splicing member;
means for regulating said drive means to move said knurling surface counter to said direction while maintaining the knurling surface out of contact with the webs in said path, to thereupon turn said knurling surface in said direction and toward said path with simultaneous acceleration of said surface at least close to said at least substantially identical speed and to thereafter move the thus accelerated knurling surface in said direction against and with one of the webs in said path. - View Dependent Claims (23, 24, 25, 26, 29, 30, 31, 32, 33)
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27. An apparatus for splicing the trailing end of an expiring running web to the leading end of a fresh running web while the leading and trailing ends advance next to each other, in the same direction and at an at least substantially identical speed along a predetermined path, comprising:
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a rotary splicing member adjacent one side of said path and having a web knurling surface;
regulatable drive means for said splicing member;
means for regulating said drive means to move said knurling surface in a first direction away from said path, to thereupon move said surface in a second direction counter to said first direction and toward said path with simultaneous acceleration of said surface at least close to said at least substantially identical speed, and to thereafter move the thus accelerated knurling surface in said second direction against and with one of the webs in said path; and
means for separating a remnant of at least one web not later than upon a completed splicing of the webs to each other wherein at least one of the webs includes the remnant extending beyond the spliced-together portions of the webs in said path, and said separating means includes means for tearing the remnant from the at least one web. - View Dependent Claims (28)
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Specification