Method and apparatus for producing coreless roll assemblies of separable bags

A method for forming a self-sustaining coreless roll package of serially wound sheets in which the sheets can be removed from the center of the roll one at a time comprising the steps:

• a. guiding and rolling a first and successive sheet about an axially translatable spindle thereby forming a roll of separable folded sheets on said spindle;
• b. pressurizing the interface of the outer surface of the spindle and the inner surface of the innermost wound sheet;
• and
• c. removing the spindle from the bore of the roll thereby producing a coreless roll of sheets.

A method for forming a strand of separable folded sheets into a self-sustaining coreless roll package in which the serially wound sheets can be dispensed from the center of the roll one at a time comprising the steps:

• a. folding a first sheet between its outer end extremities and advancing the folded end of said first sheet to a roll winding station:
• b. folding a second sheet between its outer end extremities and overlapping the folded end of the second sheet a unitary distance on at least one of the trailing end portions of said folded first sheet to form an overlapping arrangement;
• c. folding, advancing and overlapping a predetermined number of succeeding sheets in a like manner into a strand of sheets;
• d. guiding and rolling said strand about an axially translatable spindle thereby forming a roll of separable overlapped folded sheets;
• and
• e. removing the spindle from the bore of the roll thereby producing a coreless roll of overlapped sheets.

A method for forming a strand of separable folded sheets into a self-sustaining coreless roll package in which the serially wound sheets can be dispensed from the center of the roll one at a time, comprising the steps:

• a. folding a first sheet between its outer end extremities and advancing the folded end of said first sheet to a roll winding station;
• b. folding a second sheet between its outer end extremities and interleaving the second folded end of the second sheet a unitary distance between at least the trailing end portions of said folded first sheet to form a separable strand of sheets;
• c. folding, advancing and interleaving a predetermined number of succeeding sheets in a like manner into a strand of sheets;
• d. guiding and rolling said strand about an axially translatable spindle thereby forming a roll of separable interleaved folded sheets;
• and
• e. removing the spindle from the bore of the roll thereby producing a coreless roll of interleaved sheets.