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US 5,000,806 AGranted
Method and apparatus for applying an elastic strand to a disposable diaper
AssigneePaper Converting Machine Company
InventorsJohn R. Merkatoris, James E. Hertel, Dale E. Zeman
Life of this patent
Estimating the term…
Abstract
The invention includes a method and apparatus for applying an elastic strand to disposable diapers. It uses canted, spindle-equipped wheels for engaging an elastic strand, moving the elastic strand into a sinuous configuration and stretching the strand. Stripping belts apply the strand to a diaper component.
Claims15
An apparatus for making disposable diapers having a stretchable waist, said apparatus comprising:
- a frame;
- a pair of spaced-apart wheels mounted on said frame for rotation about angularly related axes whereby corresponding points on the peripheries of said wheels are closer together at a first position than at a second position, said second position being spaced circumferentially from said first position;
- spindle means disposed on the periphery of each of said wheels for receiving an elastic strand and placing said strand into a stretched, sinuous configuration upon wheel rotation from said first to said second position, the spindle means of one wheel interleaving with the spindle means of the other wheel at the first position so that the spindle means may receive the strand at the first position and move adjacent portions of the strand in opposite directions as the wheels rotate away from the first position;
- and transfer means disposed on said frame for removing said elastic strand from said spindle means at a second position, adhesively and substantially simultaneously uniting said elastic material to a diaper component web, and applying a pressure for a predetermined duration to allow the bond between the elastic material and the diaper component web to develop.
1 more element
Apparatus for applying an elastic waistband in disposable diaper manufacture comprising:
- a frame defining a first longitudinally extending path for advancing a diaper component web;
- means operably associated with said frame for advancing said component web in said first path;
- means operably associated with said frame for applying adhesive to said web at longitudinally spaced portions thereof;
- a pair of spaced apart wheels mounted on said frame in said second path prior to the intersection of said paths for rotation about angularly related axes to pass through a first position and a second position spaced from said first position, said second position being at the intersection of said paths;
- said wheels each being equipped with spindle mans disposed on the periphery of each of said wheels for receiving an elastic strand and placing said strand into a stretched, sinuous configuration upon wheel rotation from said first to said second position, the spindle means of one wheel interleaving with the spindle means of the other wheel at the first position so that the spindle means may receive the strand at the first position and move adjacent portions of the strand in opposite directions as the wheels rotate away from the first position;
- means on said frame in said second path for advancing said elastic strand material toward said wheels;
- means operably associated with said frame for rotating said wheels to place said wheel peripheries closer together at said first position than at said second position whereby said elastic strand material is elastically stretched in moving from said first position to said second position;
- and
- transfer means disposed on said frame for removing said elastic strand from said spindle means at a second position, adhesively and substantially simultaneously uniting said elastic strand to a diaper component web, and applying a pressure for a predetermined duration to allow the bond between the elastic strand and the diaper component web to develop.
6 more elements
A method of manufacturing disposable diapers using a pair of canted wheels rotated about angularly related axes, said wheels each including spindle means for stretching a strand of elastic material and placing it in a predetermined configuration, said method comprising the steps of:
- (a) advancing an elongate diaper component web along a predetermined path;
- (b) rotatably advancing an elastic strand material with said canted wheels and spindle means and simultaneously bending said strand into a predetermined configuration and stretching said strand, said spindle means interleaving and receiving the strand at the first position and moving adjacent portions of the strand in opposite directions to form the predetermined configuration;
- (c) adhesively uniting said elastic strand and said elongate diaper component web at the second position;
- and
- (d) applying pressure to said elastic strand and said component web for a predetermined duration.
2 more elements
Dependencies are inferred from the claim text.