Stock material or miscellaneous articles – Plural parts with edges or temporary joining means each...
Patent
1981-11-17
1982-09-21
Van Balen, William J.
Stock material or miscellaneous articles
Plural parts with edges or temporary joining means each...
5420, 2420516R, 160DIG18, 272109, 4283044, D04H 1100
Patent
active
043507212
ABSTRACT:
In a collapsible indoor sports mats in which a plurality of unit mats can be connected to and separated from one another by means of fasteners, the improvement wherein tapes of the fasteners having engaging teeth aligned thereon are fixed on the backs of the connecting edges of the unit mats, non-toothed portions for guiding a slider are formed by removing the engaging teeth, at the ends of extending parts extending from the unit mats, and location reference line marks are put at corresponding positions on the surface of the extending parts opposing one another, so that court lines on the unit mats to be connected are automatically matched with one another.
REFERENCES:
patent: 2511414 (1950-06-01), Poux
patent: 3906129 (1975-09-01), Damois
patent: 4042735 (1977-08-01), Koneya
patent: 4137583 (1979-02-01), Baldwin et al.
patent: 4137683 (1979-02-01), Pfeiffer
patent: 4160306 (1979-07-01), Pizzoccaro
Nagase Rubber Co., Ltd.
Van Balen William J.
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