US3816199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concealed fastening of predecorated wallboard
Assignee: National Gypsum Co
•
Filing: 1972-08-17
•
Granted: 1974-06-11
•
Expires: 1992-08-17
Abstract
Abstract Special wallboards having predecorated facing sheets adhered except along side edges, screwed to studs along side edges, with the unadhered portion subsequently adhered over fasteners and extending into the joint between wallboards, with means provided whereby the portions between joints remain in place.
Inventors
- 👤 J Dawdy
- 👤 D Winkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:02
CPC Classifications
E; E04; E04F; E04F19/00; E04F19/02; E04F19/06; E04F13/00; E04F13/07; E04F13/08; E04F13/0889; Y; Y10; Y10S; Y10S52/00; Y10S52/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
The method of forming and erecting predecorated wallboard comprising the steps of adhering a major central portion of a predecorated sheet to the major central portion of the face of an undecorated wallboard, leaving narrow elongate edge portions of said undecorated wallboard free of said predecorated sheet and leaving slightly wider edge flap portions of said sheet that are not adhered to said wallboard, attaching said wallboard and other similar wallboards to structural supporting elements by fasteners inserted from said face through said edge portions of said undecorated wallboard with said wallboards spaced closely edge to edge, affixing said flaps firmly over respective board edge portions and over said fasteners with the outermost edges of said flaps extending into the gap formed between two adjacent wallboard edges, and affixing said outermost edges firmly within said gap.
Claim 2
Independent Claim
136 words
The method of forming and erecting predecorated wallboard comprising the steps of adhering a major central portion of a predecorated sheet to the major central portion of the face of an undecorated wallboard, leaving narrow elongate edge portions of said undecorated wallboard free of said predecorated sheet and leaving slightly wider edge flap portions of said sheet that are not adhered to said wallboard, attaching said wallboard and other similar wallboards to structural supporting elements by fasteners inserted from said face through said edge portions of said undecorated wallboard with said wallboards spaced closely edge to edge, affixing said flaps firmly over respective board edge portions and over said fasteners with the outermost edges of said flaps extending into the gap formed between two adjacent wallboard edges, and affixing said outermost edges firmly within said gap.
Claim 3
Dependent Claim
93 words
In the method of claim 1 the additional steps consisting of adhering a relatively rigid right angled, elongate plastic strip to the underside of each said flap portions, positioning said strip on said flap so that the flap can be placed on the board edge portion with said angle of said strip being disposed at the outer edge corner of said wallboard, and, after attaching said wallboard to supporting elements, placing said flap on the board edge portion with the angled portion of said plastic strip disposed in said gap between board edges.
Claim 4
Dependent Claim
47 words
In the method of claim 2, the additional steps consisting of making a groove in said plastic strip to function as a hinge, adhering the hinged edge of said strip to said undecorated wallboard and adhering the predecorated sheet to the outer surface of said plastic strip.
Claim 5
Dependent Claim
45 words
In the method of claim 1 the additional step of adhering a relatively heavy paper backing onto the underside of said predecorated sheet and preforming corners in said sheet and backing to conform to the corners at the two side edges of said undecorated wallboard.
Claim 6
Dependent Claim
91 words
In the method of claim 1 the additional steps of forming a gap spacer from an elongate rigid element having a right angled cross section with one leg having a thickness equal to the desired gap spacing between boards and a second leg having temporary fastening means for repeated use in fastening said second leg to the undecorated wallboard face, placing said gap spacer on a wallboard edge while attaching a second wallboard adjacent thereto, and holding said second wallboard edge against said gap spacer during attachment of said second wallboard.
Claim 7
Dependent Claim
60 words
In the method of claim 1, the steps of placing said flap over said gap and rolling a roller which is no wider than said gap over the line of said gap, forcing said flap into said gap, forcing an adjacent flap into the same gap, and subsequently inserting a thin predecorated strip into said gap between said adjacent flaps.
Claim 8
Dependent Claim
42 words
In the method of claim 6, the additional step of adhering a narrow strip of pressure-sensitive adhesive to the underside of said flaps and adhering said flaps to said undecorated wallboard as said flap outermost edges are being disposed in said gap.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |