US3994471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ply joint bar
Assignee: Individual
•
Filing: 1975-02-26
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Granted: 1976-11-30
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Expires: 1995-02-26
Abstract
Abstract A ply joint bar for casting a seamless ceiling from a hardening material such as plaster or concrete, poured over the surfaces of adjacent molding panels, has a bridge with a lower surface resting on and flush with two such adjacent panels and an upper gable-like portion adapted to be anchored in the hardened casting material, an optional base member with two adjacent coplanar surfaces which grasp the underside of the panels, and a leg frangibly connected at one of its ends to the bridge and permanently connected at its other end to the base member, so as to separate adjacent panels sandwiched between the bridge and base member. After the casting material hardens, the molding panels are removed and the frangible leg separated from the bridge leaving a substantially seamless ceiling surface with the bridge embedded therein and its lower surface flush therewith.
Inventors
- 👤 Anthony Turolla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
E; E04; E04G; E04G17/00; E04B; E04B5/00; E04B5/16; E04B5/32; E04G17/005
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
146 words
A joint bar for preventing formation of a seam in cast material in the area between the edges of two panels having planar surfaces on which the material is to be cast comprising: a bridge member having an upper surface with anchor means projecting from said upper surface adapted for affixing said bridge member in the casting material poured thereover and hardened, and a substantially flat lower surface adapted to engage the upper surfaces of the panels so that said lower surface is substantially contiguous with the panel surfaces and a leg member attached to said lower surface, the edges of the panels being located adjacent said leg member, said leg member being frangible adjacent the lower surface to be broken away when the panels are removed so that said lower surface of said bridge member remains substantially smooth when said leg member is broken therefrom.
Claim 2
Dependent Claim
146 words
A joint bar for preventing formation of a seam in cast material in the area between the edges of two panels having planar surfaces on which the material is to be cast comprising: a bridge member having an upper surface with anchor means projecting from said upper surface adapted for affixing said bridge member in the casting material poured thereover and hardened, and a substantially flat lower surface adapted to engage the upper surfaces of the panels so that said lower surface is substantially contiguous with the panel surfaces and a leg member attached to said lower surface, the edges of the panels being located adjacent said leg member, said leg member being frangible adjacent the lower surface to be broken away when the panels are removed so that said lower surface of said bridge member remains substantially smooth when said leg member is broken therefrom.
Claim 3
Dependent Claim
81 words
A joint bar according to claim 1 further comprising: a base member with two adjacent coplanar surfaces, parallel to said lower surface and separated at adjacent parallel edges only by the thickness of said leg member, upon which the edges of two adjacent molding panels may be rested, said leg member permanently attached to said base member to form with it and said bridge member opposite open channels separated by said leg member and adapted to receive said adjacent molding panels.
Claim 4
Dependent Claim
33 words
A ply joint bar according to claim 2 wherein said surfaces of said base member further comprise shoulders to support said molding panels and raise them from said surfaces of said base member.
Claim 5
Dependent Claim
23 words
A ply joint bar according to claim 1 wherein said leg member is substantially transverse to said lower surface of said bridge member.
Claim 6
Dependent Claim
17 words
A ply joint bar according to claim 1 wherein said anchor means has two inwardly sloping walls.
Claim 7
Dependent Claim
16 words
A ply joint bar according to claim 5 wherein said walls terminate in a rounded lip.
Claim 8
Dependent Claim
28 words
A ply joint bar according to claim 1 wherein said anchor means includes a projecting member substantially transverse to said lower surface and having shoulder means protruding therefrom.
Claim 9
Dependent Claim
16 words
A ply joint bar according to claim 7 wherein said shoulder means has a barb-shaped cross-section.
Claim 10
Dependent Claim
20 words
A ply joint bar according to claim 1 wherein said lower surface is roughened to promote adhesion by coating materials.
Claim 11
Dependent Claim
28 words
A ply joint bar according to claim 1 wherein groove-like incisions are formed along the intersection of said leg member with said lower surface of said bridge member.
Claim 12
Dependent Claim
22 words
A ply joint bar according to claim 1 made from a rigid material selected from the group consisting of metal and plastic.
Claim 13
Dependent Claim
14 words
A ply joint bar according to claim 1 made from a flexible plastic material.
Claim 14
Dependent Claim
14 words
A ply joint bar according to claim 1 wherein said leg member is tapered.
Claim 15
Dependent Claim
14 words
A ply joint bar according to claim 13 wherein said leg member is barbed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |