US 5,137,225 AGranted

Rewinding machine for the formation of rolls or logs, and winding method

AssigneeFabio Perini S.p.A.

InventorGuglielmo Biagiotti

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Abstract

The rewinding machine of the present invention produces rolls or logs of paper such as toilet paper, kitchen towels, etc. It includes an upper winding cylinder (9; 109), a lower winding cylinder (10) forming with the upper one an interspace (12), a mobile roller (14) able to define with said two cylinders a space in which the roll is wound. A pusher (22) inserts individual cores (A) in said interspace, and an applicator (34, 36, 38) wets the cores with adhesive. In combination with one (9; 109) of the two winding cylinders (9, 109; 10) a fixed surface (52; 80) is provided. A web of incoming paper N slides along the surface (52; 80). The pusher (22) moves the core (A1) at an insertion speed which is lower than the paper-feeding speed. During its insertion into the interspace (12) the core (A1) moves toward the fixed surface (52; 80), providing a temporary braking effect on the web N lying between the fixed surface (52; 80) and the core (A1). This causes the web to tear between the just-completely formed roll (R) and the incoming core (A1).

Claims18

Dependent claims

A rewinding machine for the formation of finished rolls (R) or logs of paper or the like from a moving web (N), especially for the formation of small rolls of paper, including

an upper winding cylinder (9;109),
a lower winding cylinder (10) forming with the upper one an interspace (12), the web (N) being tangent to one of said winding cylinders (9,10,109).
a mobile roller (14) able to define with said two cylinders the space for winding of the roll,
means (22) for inserting individual cores (A) in said interspace,
means (34,36,38) to apply adhesive on the cores,
a surface (52,80) combined with one (9,109) of the two winding cylinders (9,109,10) along which the incoming web (N) is made to slide just before reaching said interspace (12),
said surface (52,80) being combined with the winding cylinder (9,109) to which the web is tangent,
said insertion means (22) capable of moving a core (A1) at an insertion speed which is lower than the paper-feeding speed of said web (N),
said cylinders (9,109,10), insertion means (22) and said surface (52,80) being arranged so that during the insertion of the core (A1) into the interspace (12), the core cooperates with said surface (52,80) to effect a temporary braking of the web (N) lying between the same surface (52,80) and the core (A1), thus causing the tearing of the web (N) between a just-finished roll (R) and the incoming core (A1) on which the winding of the web (N) must be started,
including members (58) on one side of said interspace (12) opposite said surface (52), whereby said core in course of insertion is pinched between said members (58) and said surface (52).

7 more elements

A method for the formation of rolls (R) of web material (N) on a core (A) which includes

providing two winding cylinders (9,109,10),
feeding the web (N) between said two winding cylinders and tangent to one of said cylinders,
inserting the core (A) between said two cylinders into contact with said web (N),
upon completion of a roll (R) moving said roll away from the formation region by slowing down one of the winding cylinders (10) while simultaneously inserting a core for the formation of a new roll close to said winding cylinders,
applying adhesive to the core prior to its movement between said winding cylinders,
providing a surface (52,80) near the winding cylinder to which the web (N) is tangent,
pinching the web (N) between said core and said surface whereby to slow down the movement of said web and cause a tearing surface between the point of contact between the core and the surface and the point of tangency of said web on the completed roll (R),
securing the free edge of the web (N) after the tear is completed to the adhesive on the core surface and winding the web on said core without reversal of advancement direction of the web,
wedging the core for the formation of the successive roll between said surface (52) and a plurality of members (58) which act as core pinching surfaces associated to the other of said winding cylinders, whereby the web to be torn in pinched and braked.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/547,169Filed 2 Jul 1990
Priority: IT 9476 A/8911 Jul 1989
Granted: 11 Aug 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B65H 19/30
In winding mechanisms or in connection with winding operations: lifting, transporting, or removing the web roll; Inserting core
B65H 19/2269
The web roll being driven by a winding mechanism of the nip or tangential drive type: cradle
B65H 2301/4172
Handling web roll: by circumferential portion, e.g. rolling on circumference
B65H 2301/41812
Core or mandrel supply: by conveyor belt or chain running in closed loop