Method and apparatus for winding coreless rolls

In a method for winding in cycles an elongate web along an elongated path of travel to cyclically form a series of coreless, convolutely wound rolls from said web, said web having equally longitudinally spaced transverse lines of perforation, said web having first and second sides, the steps of

• providing a rotating enveloping roller in contact with said web first side, also providing first and second rotating mandrels adapted to contact said web second side and a rotating transfer roller in the path of travel of said web, said web having an upstream end at said enveloping roller and a downstream end at said first mandrel, said transfer roller having a surface portion adapted to contact said first side of said web when said web is advancing in said path and upstream of said first mandrel, said second mandrel also being in contact with said web when said transfer roller contacts said web and said second roller then being upstream of said transfer roller,
• advancing a web in partial enveloping relation with said enveloping roller and winding said web on said first mandrel,
• moving said second mandrel to a position adjacent said path,
• moving said enveloping roller and transfer roller to positions adjacent each other with said second mandrel being adjacent both said rollers and defining a nip with said enveloping roller,
• rotating said transfer roller surface portion in a direction opposite to the direction of advance of said web in said path while moving said transfer roller to apply a steady force to web to deflect said web toward said enveloping roller,
• thereafter, severing said web between said first and second mandrels and along a predetermined line of perforation to provide a free leading edge portion, and
• continuing the application of said force by said transfer roller to press said leading edge portion against said enveloping roller and toward and into said nip to wind said web on said second mandrel.

Apparatus for winding in cycles an elongate web having first and second opposite sides and also having equally longitudinally spaced transverse lines of perforation to form a series of coreless convolutely wound rolls, comprising a frame equipped with a perforator and defining a path of web travel and having a turret equipped with a plurality of orbiting, circumferentially spaced rotating mandrels, said frame also having a rotating enveloping roller, said web path having an upstream end at said enveloping roller and a downstream end at said turret, said perforator having blades to provide bonds between perforations of the order of 1/2-1 millimeters,

• a movable steady non-pulsating force applying means and movable web severing means mounted on said frame outside the mandrel orbit,
• means operably associated with said frame for advancing said web downstream along said path, said path during a major portion of each winding cycle having a generally linear configuration between an upstream position where said web first side is on said enveloping roller and a downstream position where said web second side is on a first mandrel on which said web is being directly wound,
• means on said frame for rotating said turret to bring a second mandrel into contact with said web second side in a position between said enveloping roller and said first mandrel to start a portion of each winding cycle subsequent to said major portion,
• means on said frame for moving said enveloping roller and said web during said subsequent portion of each winding cycle in one generally arcuate direction partway around said second mandrel to form a generally S-shaped configuration in said web path about said enveloping roller and said second mandrel while said web is being wound on said first mandrel whereby said web first partially wraps said enveloping roller upstream of said second mandrel and with said enveloping roller thereafter being closely adjacent said second mandrel to form a nip,
• means on said frame for moving said steady force applying means to apply a steady transverse force to said web downstream of said second mandrel to deflect said web toward said enveloping roller,
• means on said frame for moving said web severing means into contact with said web to immediately start transversely severing said web along a predetermined line of perforation in said path between said first and second mandrels to provide a free leading edge portion, and
• said applying means continuing the application of said force to direct said free leading edge portion into said nip between said enveloping roller and said second mandrel.

Apparatus for winding in cycles an elongate web having first and second sides and also having equally longitudinally spaced transverse lines of perforation to form a series of coreless, convolutely would rolls, comprising a frame defining a path of web travel,

• an enveloping roller, first and second mandrels and a transfer roller all rotatably mounted on said frame in said path, said transfer roller having a surface portion adapted to contact a web advancing in said path, said path having an upstream end at said enveloping roller and a downstream end at said first mandrel,
• means on said frame for advancing said web in partial enveloping relation with said enveloping roller and onto said first mandrel, said path during a major portion of each winding cycle having a generally linear configuration between an upstream position where said web first side is on said enveloping roller and a downstream position where said web second side is on said first mandrel,
• turret means rotatably mounted on said frame for moving said second mandrel to a position adjacent said path while moving said first mandrel toward a roll stripping position, said second mandrel in said position adjacent said path being in contact with said web second side and being located between said enveloping roller and said first mandrel to start a portion of each winding cycle subsequent to said major portion,
• means on said frame for moving said enveloping roller and said web during said subsequent portion of each winding cycle in one generally arcuate direction partway around said second mandrel to form a generally S-shaped configuration in said web path about said enveloping roller and said second mandrel while said web is being wound on said first mandrel whereby said web partially wraps said enveloping roller upstream of said second mandrel and with said enveloping roller being closely adjacent to said second mandrel to define a nip between said second mandrel and said enveloping roller, said web downstream of said second mandrel having a generally linear configuration between said second mandrel and said first mandrel,
• means on said frame for rotating said transfer roller surface portion in a direction opposite to the direction of advance of said web,
• means on said frame for severing said web along a predetermined line of perforation in said path between said first and second mandrels to provide a leading edge portion, and
• means on said frame for substantially simultaneously with said severing, contacting said transfer roller with said web leading edge portion to press said leading edge portion against said enveloping roller and toward and into said nip to wind said web on said second mandrel.

In a method for winding in cycles an elongate web having first and second opposite sides and also having equally longitudinally spaced lines of transverse perforation to form a series of coreless convolutely wound rolls, the steps of

• providing a center wind rewinder having a turret equipped with a plurality of orbiting, circumferentially spaced rotating mandrels, said rewinder also having a rotating enveloping roller and providing a web path having an upstream end at said enveloping roller and a downstream end at said turret,
• providing a transfer roller adjacent said web path,
• advancing said web downstream along said path, said path during a major portion of each winding cycle having a generally linear configuration between an upstream position where said web first side is on said enveloping roller and a downstream position where said web second side is on a first mandrel on which said web is being directly wound,
• rotating said turret to bring a second mandrel into contact with said web second side in a position between said enveloping roller and said first mandrel to start a portion of each winding cycle subsequent to said major portion,
• moving said enveloping roller to contact and move said web during said subsequent portion of each winding cycle in one generally arcuate direction partway around said second mandrel to form a generally S-shaped configuration in said web path about said enveloping roller and said second mandrel while said web is being wound on said first mandrel whereby said web first partially wraps said enveloping roller upstream of said second mandrel and thereafter with said enveloping roller being closely adjacent said second mandrel to form a nip,
• applying steady force to said web downstream of said second mandrel to deflect said web toward said enveloping roller,
• thereafter transversely severing said web along a predetermined line of perforation in said path between said first and second mandrels to provide a free leading edge portion, and
• continuing the application of said force to direct said free leading edge portion into the said nip between said enveloping roller and said second mandrel,
• said transfer roller having a surface portion adapted to contact said first side of said web and downstream of the contact of said second web with said mandrel while said web is advancing in said path, and rotating said transfer roller surface portion in a direction opposite to the direction of advance of said web to provide in combination with said enveloping roller said force to deflect said web and to direct said web free leading edge portion into said nip.

Apparatus for winding in cycles an elongate web having first and second sides and also having equally longitudinally spaced transverse lines of perforation to form a series of coreless, convolutely wound rolls, comprising a frame defining a path of web travel and having a turret equipped with a plurality of orbiting, circumferentially spaced rotating mandrels, said frame also having a rotating enveloping roller, said web path having an upstream end at said enveloping roller and a downstream end at said turret,

• means operably associated with said frame for advancing said web downstream along said path, said path during a major portion of each winding cycle having a generally linear configuration between an upstream position where said web first side is on said enveloping roller and a downstream position where said web second side is on a first mandrel on which said web is being directly wound,
• means on said frame for rotating said turret to bring a second mandrel into contact with said web second side in a position between said enveloping roller and said first mandrel to start a portion of each winding cycle subsequent to said major portion,
• means on said frame for moving said enveloping roller and said web during said subsequent portion of each winding cycle in one generally arcuate direction partway around said second mandrel to form a generally S-shaped configuration in said web path about said enveloping roller and said second mandrel while said web is being wound on said first mandrel whereby said web first partially wraps said enveloping roller upstream of said second mandrel and with said enveloping roller thereafter being closely adjacent said second mandrel to form a nip,
• means on said frame for applying a steady transverse force to said web downstream of said second mandrel to deflect said web toward said enveloping roller,
• means on said frame for transversely severing said web along a predetermined line of perforation in said path between said first and second mandrels to provide a free leading edge portion,
• said applying means continuing the application of said force to direct said free leading edge portion into said nip between said enveloping roller and said second mandrel, and
• said frame including a transfer roller adjacent said web path, said transfer roller having a surface portion adapted to contact a web advancing in said path, and means for rotating said transfer roller surface portion in a direction opposite to the direction of advance of said web to apply said force to direct said web free leading edge portion into said nip.