Machine and method for the formation of coreless logs of web material
First Claim
1. A surface rewinding machine for producing logs of web material without central winding cores, including a first winder roller on which the web material is carried and a second winder roller defining, along with the first winder roller, a nip through which the web material passes, said machine further comprising a member movable relative to the first winder roller, which mobile member is cyclically moved toward the surface of said first winder roller in order to retard the web material between said mobile member and said surface of the first winder roller, thereby causing the leading edge of the web material to curl and to start winding on itself.
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Accused Products
Abstract
There is disclosed a rewinding machine for the production of logs(R) of web material (N) without central winding core. It comprises a first winder roller (11) around which the web material is driven and a second winder roller (13) defining, with the first winder roller, a nip (14) through which the web material passes. A member (21) is also provided which is movable relative to the first winder roller (11) and which is cyclically moved toward the surface of said first winder roller with the web (N) between the member (21) and the roller (11) in order to pinch and thus brake the web material between said member (21) and the first winder roller (11), thereby tearing the web and causing the free edge generated by the interruption of the web material to start winding up on itself.
71 Citations
49 Claims
- 1. A surface rewinding machine for producing logs of web material without central winding cores, including a first winder roller on which the web material is carried and a second winder roller defining, along with the first winder roller, a nip through which the web material passes, said machine further comprising a member movable relative to the first winder roller, which mobile member is cyclically moved toward the surface of said first winder roller in order to retard the web material between said mobile member and said surface of the first winder roller, thereby causing the leading edge of the web material to curl and to start winding on itself.
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37. A method for the production of logs of web material without a tubular winding core, including the steps of:
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a) providing a first winder roller around which said web material is moved, the first winder roller rotating in a direction having a periphery velocity in a direction of the moving web material; b) providing a second winder roller, which rotates in the same direction as the first winder roller and which forms, with said first winder roller, a nip through which said web material passes; c) providing, upstream of said first and second winder rollers, a rolling surface adjacent said second winder roller and upstream of said nip; d) enabling the winding of a leading edge of the web material on itself by forming initial turns of web material upstream of said nip, said initial turns forming the central portion of the log, said central portion of web material being formed by rolling the web material between said rolling surface and the surface of first winder roller, said rolling causing the movement of said central portion of web material toward said nip; e) moving said central portion through said nip and continuing the winding of the log on said central portion while said log is in contact with the surfaces of said first and said second winder roller. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A method for the production of logs of web material without tubular winding core, including the steps of:
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a) providing a first winder roller around which said web material is moved, the first winder roller rotating in a direction having a periphery velocity in a direction of the moving web material; b) providing a second winder roller, which rotates in the same direction as the first winder roller and which forms, with said first winder roller, a nip through which said web material passes; c) providing, upstream of said first and second winder rollers, a rolling surface adjacent said second winder roller and upstream of said nip; d) enabling the winding of a leading edge of the web material on itself by forming initial turns of web material upstream of said nip, said initial turns forming the central portion of the log, said central portion of web material being formed by rolling the web material between said rolling surface and the surface of first winder roller, said rolling causing the movement of said central portion of web material toward said nip; e) moving said central portion through said nip and continuing the winding of the log on said central portion.
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48. A method for the production of logs of web material without tubular winding core, including the steps of:
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a) providing a first winder roller around which said web material is moved, the first winder roller rotating in a direction having a periphery velocity in a direction of the moving web material; b) providing a second winder roller, which rotates in the same direction as the first winder roller and which forms, with said first winder roller, a nip through which said web material passes; c) folding back the leading edge of the web upstream of said first and second winder rollers; d) forming initial turns of web material upstream of said nip and causing movement of said initial turns toward said nip by rolling contact with the first winder roller, said initial turns forming the central portion of the log; e) moving said central portion through said nip and continuing the winding of the log on said central portion.
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49. A rewinding machine for producing logs of web material without central winding cores comprising a first winder roller, a second winder roller, and a member movable relative to said first winder roller which said member is cyclically moved toward the surface of said first winder roller to retard the web material between said mobile member and surface of the first winder roller, thereby causing said web material to wind on itself, said second winder roller in conjunction with said first winder roller defining a nip through which the web material passes.
Specification