초록 ▼

There is provided a method of capping mechanical fasteners from a web having an array of upstanding stems. A heated surface member is positioned opposite a support forming a nip into which the web is fed. The heated surface member has a series of laterally spaced elongated peak and valley structures

There is provided a method of capping mechanical fasteners from a web having an array of upstanding stems. A heated surface member is positioned opposite a support forming a nip into which the web is fed. The heated surface member has a series of laterally spaced elongated peak and valley structures such that more than one peak and valley structure contacts and deforms each stem structure. The peak and valley groove structures provided asymmetric elongation and deformation of top portion of the stem structures forming hook heads.

대표청구항 ▼

[ We claim:] [1.] A method for capping hook heads on a backing comprising:a) providing a web having a web backing with an array of substantially upstanding projections, each formed at least in part by a substantially upstanding stem base portion, the web having a first thickness;b) providing a nip h

[ We claim:] [1.] A method for capping hook heads on a backing comprising:a) providing a web having a web backing with an array of substantially upstanding projections, each formed at least in part by a substantially upstanding stem base portion, the web having a first thickness;b) providing a nip having at least one heated surface member and at least one opposing surface member defining a gap therebetween, which has a compression zone defined by an entry gap width and an end gap width, where the entry gap width is substantially equal to or less than the first web thickness and the end gap width being substantially less than the first web thickness;c) providing the at least one heated surface member with at least one set of peak and groove structures longitudinally extending in at least one first direction in the compression zone, where an average spacing between adjacent peak structures is less than an average width of the stem base portions immediately adjacent a stem end portion or a hook head, and the at least one set of peak and groove structures extends longitudinally for a distance at least equal to an average distance between adjacent upstanding stem base portions; andd) moving the web along a web path into and through the compression zone in a second direction such that at least top portions of the array of substantially upstanding projections are preferentially deformed by the at least one heated surface member in the at least first direction defined by the at least one set of peak and groove structures, thereby capping hook heads and forming at least one set of peak and groove structures in the hook heads.