Stock material or miscellaneous articles – Hollow or container type article – Shrinkable or shrunk
Patent
1987-04-10
1990-03-13
Cannon, James C.
Stock material or miscellaneous articles
Hollow or container type article
Shrinkable or shrunk
2 76, 2 78C, 2221, 2237, 2401, 5496, 5497, 24 16PB, 24 305P, 1122621, 1122622, 156 731, 156 85, 156 86, 156 92, 156 93, 156155, 156161, 156163, 156164, 156211, 156249, 156252, 156256, 156290, 156291, 428202, 428212, 428217, 428910, 428 368, 428 76, 428101, 428102, 428110, 428132, 428135, 428138, 428142, 428152, 428161, 428162, 428172, 428192, 428195, 428196, 493962, 6043852, 383 71, 383112, 383116, 383118, A41B 914, A41B 1302, A41F 902, A41F 1316, B32B 3116
Patent
active
049082477
ABSTRACT:
An article including at least one segment which is capable of being elastically shirred along at least a portion of its length subsequent to manufacture of the article, preferably by mechanical manipulation of a predetermined portion of the elastically shirrable segment. The predetermined mechanically manipulatable portion of the elastically shirrable segment preferably comprises an elastomeric monomer which is maintained in a prestretched and tensioned condition in the desired direction of shirring. The opposed ends of the elastically shirrable segment in the article are interconnected to one another through the prestretched and tensioned elastomeric member. The prestretched and tensioned elastomeric member is also secured in fixed relation to at least one rigidifying member to form a composite structure which is strong enough to resist collapse in a direction parallel to the tensile forces acting upon the prestretched and tensioned elastomeric member prior to mechanical manipulation of the composite structure. The article is elastically shirred by mechanically manipulating the predetermined portion of the shirrable segment until movement of the prestretched and tensioned elastomeric member relative to the rigidifying member is effected. To elasticize the article containing the elastically shirrable segment, the relative movement between the prestretched and tensioned elastomeric member and the rigidifying member must be sufficient to release the tensile forces in the mechanically manipulated portion of the composite structure. This relative movement produces a degree of elastic shirring in the segment, and consequently in the article to which it is attached, in the direction of prestretching of the elastomeric member. The degree of segment shirring is proportional to the extent to which there is relative movement between the prestretched and tensioned elastomeric member and the rigidifying member in the area comprising the composite structure. Thus, the tension in the elastically shirrable segment can be increased by the user, as desired, by mechanically manipulating more of the composite structure.
Elastically shirrable segments of the present invention are particularly well suited to high speed article manufacturing operations, since the segments can be applied to the articles in a substantially untensioned condition and their tension released subsequent to article manufacture.
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Baird James C.
Koger, II Thurman J.
Muckenfuhs Delmar R.
Spahni Milton D.
Cannon James C.
Gorman John V.
Linman E. Kelly
The Procter & Gamble & Company
Witte Richard C.
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