US 4,917,746 AGranted

Apparatus and method for contouring elastic ribbon on disposable garments

OwnerHugo L. Kons, Richard H. Frickinventors

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Abstract

A method and apparatus for applying an elastic ribbon in a curved path to a continuously moving web of material. A rotatable roll is moved essentially transversely to the direction of the moving web of material. The movement of the roll is imparted to the elastic ribbon which is then adhered to the continuously moving web of material. The elastic ribbon passes around the roll with a predetermined stretch. The axis of the roll may be disposed essentially transverse to the direction of movement of the moving web or essentially perpendicular to the direction of movement of the moving web. The roll may be cylindrical in shape with a uniform radius, it may have a nonuniform radius or it may have a portion of the surface with a larger radius intermediate to the ends of the roll.

Claims50

Dependent claims

A method for applying a continuous, moving ribbon of elastic material to a moving web of material, comprising the steps of:

rotatably mounting at least one receiving roll about an axis essentially perpendicular to the surface of the web;
continuously moving the web in a direction coinciding with its length;
simultaneously moving and applying tension to the elastic ribbon in the direction of its length around a circumferential surface of the receiving roll;
oscillating said receiving roll in a direction essentially transverse to the direction of movement of the web while the ribbon is contacting said circumferential surface, imparting a coefficient of friction such that the friction of said surface with the ribbon and the tension of the ribbon together provide sufficient force on the ribbon to move the ribbon around said surface and slidingly along said rotational axis of said receiving roll in an oscillatory manner with the oscillatory motion of said receiving roll, said receiving roll being of a sufficient length to contain the axial travel of the ribbon thereacross;
feeding the oscillating ribbon into engagement with the web in an undulating pattern and adhering the ribbon thereto.

2 more elements

An apparatus for applying a continuous moving ribbon of elastic material to a moving web of material, comprising:

means for continuously moving the web in a direction coinciding with its length;
at least one receiving roll for receiving the elastic ribbon, said roll being rotatably mounted about an axis essentially perpendicular to the surface of the web;
oscillatory means for imparting oscillatory movement to said roll in a direction essentially transverse to the direction of movement of the web;
means for moving the elastic ribbon in the direction of its length;
and means for applying tension to the ribbon while the ribbon is moving around said oscillatory roll;
said oscillatory roll having a circumferential surface engaging the ribbon, said surface having a coefficient of friction such that the friction of said surface with the ribbon and the tension in the ribbon together provide sufficient force on the ribbon to move the ribbon around said circumference and along said rotational axis of said receiving roll in an oscillatory manner with the oscillatory motion of said receiving roll, said roll being of a sufficient length to contain the oscillatory travel of the ribbon longitudinally across the circumference thereof;
and engagement means for bringing the oscillating ribbon and the web into engagement with one another.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/621,900Filed 18 Jun 1984 · continuation in part
Priority: 21 Jun 1982
Granted: 17 Apr 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

A61F 13/15609
Having elastic ribbons fixed thereto; Devices for applying the ribbons: the ribbons being applied in an irregular path
B29C 66/1122
Single lapped joints: single lap to lap joints, i.e. overlap joints
B29C 66/221
Said joint lines being in the form of recurring patterns: being in the form of a sinusoidal wave
B29C 66/433
Joining a relatively small portion of the surface of said articles: casing-in, i.e. enclosing an element between two sheets by an outlined seam