Method and apparatus for winding up successive segments of a continuously delivered strip

Claim 2

In a method for winding up on mandrels segments cut from a continuously delivered strip of material, said strip being cut at the end of the winding on a given mandrel by means of a blade carried by a movable blade carrier, the improvement that said cutting is carried out be applying said movable blade carrier onto a rotating empty mandrel having at least a surface layer which has the quality of allowing the cutting edge of said blade to penetrate thereinto so that, at the end of the cutting, the transverse leading edge of the strip is automatically pressed by said blade against said surface layer of the mandrel, ensuring the initiation of the winding on the empty mandrel by maintaining the strip clamped for a short time between said mandrel and said movable blade carrier.

Claim 3

A machine for winding up strip materials for carrying out the method according to claim 1, comprising a revolving winding frame adapted to receive a first rotary mandrel on which the material is to be wound, a second empty rotary mandrel to occupy initially a rest position and to take subsequently the place of the first mandrel by rotation of the winding frame, and a rotating blade-carrier roller over which the strip driven by the first mandrel passes, wherein said blade is sunk into the lateral surface of said roller and can project from said surface, a mechanism carrying said roller and adapted to displace said roller relative to said rest position of said empty mandrel which has at least a surface layer which allows the penetration of the edge of said blade thereinto so that, during application of said blade-carrier roller onto said empty mandrel, the projection of said blade from the surface of said blade-carrier roller and its penetration into said surface layer of said empty mandrel bring about the cutting of the strip which is then kept clamped between said blade-carrier roller and said empty mandrel to ensure the engagement of the strip on said empty mandrel.

Claim 4

A machine as claimed in claim 2, wherein said blade-carrier roller is covered with a sleeve of a soft elastic material into which said blade is sunk.

Claim 5

A machine as claimed in claim 2, wherein said blade mounted on an internal axle by means of pins, said pins being arranged in the interior of said roller and said internal axle being connected to a device comprising a jack at the extremity of which is mounted a rod, said rod carrying a roller which bears on a cam fast with said axle of said blade-carrier roller, and return spring means mounted on said axle, said device being adapted for imparting to said blade a lateral reciprocating motion relative to the lateral surface of said blade-carrier roller.

Claim 6

A machine as claimed in claim 2, wherein said blade is sunk in the lateral surface of said blade-carrier roller along a generatrix of said blade-carrier roller.

Claim 7

A machine as claimed in claim 2, wherein said blade is sunk in a helical groove provided in the lateral wall of said blade-carrier roller.

Claim 8

A machine as claimed in claim 2, wherein said empty mandrel is of a material which allows the edge of said blade to penetrate thereinto.

Claim 9

A machine as claimed in claim 2, wherein said empty mandrel is a metal cylinder coated with a material which allows the edge of said blade to penetrate thereinto.

Claim 10

A machine as claimed in claim 2, wherein said mechanism comprises an arm mounted to pivot about an axle fast with the machine frame, said arm carrying said blade-carrier roller at one Of its ends and being connected at the other end with two oppositely-acting jacks, and a locking device for maintaining said blade-carrier roller in any of three positions, namely respectively a cutting, waiting and retracted position.

Claim 11

A machine as claimed in claim 9, wherein said locking device comprises a locking member displaceable by rotation about said axle, said locking member having at one end a hook having two grooves for cooperation with a pin engaged in a slot of the arm fast with one of the jacks for driving said arm and with a stop integral with the machine frame, and being connected at its other end to a control device for operating said locking member with the aid of a cam mounted on the axle of said blade-carrier roller.

Claim 12

A machine as claimed in claim 10, wherein said lock-operating device comprises a first link pivoted to said locking member and connected to a second link which carries an oscillating lever on a pin fast with said support arm, said lever having a roller cooperable with the cam keyed on the axle of said blade-carrier roller, the pivot of said two links being connected to a low-power jack mounted on said support arm which, in combination with a fixed stop on said support arm renders said links integral with said arm for transmitting the movements of said roller to said locking member.