Absorbent articles, fastener ears for absorbent articles, and processes for making same
View Patent ↗A method for manufacturing fastener ears for absorbent articles and other garments includes the step of cutting a wave-shaped pattern along the longitudinal axis of an elongated strip of material. The wave-shaped cutting pattern is substantially centered along the strip and divides the strip into a first web and a second web. Each web has a series of ear shapes, with each ear shape having a wave crest portion. Each wave crest portion has a first edge with a convex curvature. The method also includes the step of cutting each of the ear shapes out of its respective web to form a plurality of fastener ears. A fastener ear formed by such method is also contemplated.
1. A method of manufacturing fastener ears for an absorbent article comprising the steps of:
cutting a wave-shaped pattern generally along the longitudinal axis of an elongated strip of material, said wave-shaped pattern dividing the strip into a first web and a second web, each web having a series of asymmetrical ear shapes, each asymmetrical ear shape having a wave crest portion comprising first edge with a convex curvature and a second edge opposite from the first edge that varies from the first edge in terms of at least one of length and curvature; and
separating each of the asymmetrical ear shapes from its respective web to form the fastener ears.
2. The method of claim 1 , wherein said second edge is linear.
3. The method of claim 2 , wherein said cutting step comprises forming the convex edge on each ear shape adjacent to the linear edge on the ear shape.
4. The method of claim 2 , wherein said cutting step comprises forming the convex edges in the first web contiguous with the linear edges in the second web.
5. The method of claim 4 , wherein said cutting step comprises forming the convex edges in the second web contiguous with the linear edges in the first web.
6. The method of claim 2 , wherein said separating step comprises cutting each web at a point located between a convex edge and a linear edge.
7. The method of claim 2 , wherein said separating step comprises cutting each web at a point located between a convex edge and a linear edge in a direction substantially perpendicular to the longitudinal axis of the strip.
8. The method of claim 1 wherein said cutting step comprises incorporating at least about 95 percent of the strip of material into the plurality of fastener ears.
9. The method of claim 1 wherein said cutting step comprises incorporating about 100 percent of the strip of material into the plurality of fastener ears.
10. The method of claim 1 , wherein the step of cutting a wave-shaped pattern comprises making a composite cut with only one rotary die.
11. The method of claim 10 , wherein the rotary die used in said cutting step comprises a cutting edge having a primary cutting blade portion extending around the circumference of the die in a wave-shaped pattern, and a plurality of secondary cutting blade portions each lying tangentially to portions of the primary cutting blade portion.
12. The method of claim 11 , wherein the primary cutting blade portion of the rotary die used in said cutting step follows a generally trapezoidal pattern, and the secondary cutting blade portions are arcuate.
13. A fastener ear produced from the process of claim 1 .