Coating apparatus – Solid member or material acting on coating after application
Patent
1988-08-31
1991-10-01
Hoag, Willard E.
Coating apparatus
Solid member or material acting on coating after application
118200, 118205, 118215, 144330, 156 94, 156 98, B05C 100
Patent
active
050523333
DESCRIPTION:
BRIEF SUMMARY
The invention has reference to a plug of deformable material such as wood or plastic, for tightly sealing a cylindrical recess provided in wood, in which recess a crushable ampule with a wood attack combating agent can be accommodated, said ampule being attachable in a cavity of said plug by means of spring lugs, said plug being provided with a conical drive-in surface, and at least one deformable sealing clamping means being provided on said plug.
Such a plug is generally known. In the known plug, which is usually provided with an edge, the upper side of the plug will generally not be perpendicular to the surface of the wood when the recess is being drilled and will therefore not be flush with said surface. As a result extra expenses will have to be incurred for smooth burnishing as a preliminary operation before repainting. The eccentric location of the plug edge brings about a sealing that is not quite so good. In consequence of this, when applying liquid wood preservatives which are applied under pressure, the wood preservative may escape along the plug and come into contact with the paint, which may lead to discolouration, yellowing, soaking off or peeling off of the paint. Application to damp wood, in particular, causes the plug to become visible when the wood is drying. The sealing may not suffice when the wood is affected even slightly. If the plug is not hingeably connected to the ampule, the ampule may break too soon, before sealing has taken place. The use of plugs with too large a diameter will cause the wood, especially dry wood, to split. When using sawtooth-shaped ribs or clamping means, of which the sloping surface forms an angle larger than 45.degree. with the horizontal, the wood is deformed and damaged, as a result of which this may serve as a guide-way for the wood preservative liquid and leakage may occur.
It is the object of the invention to remove the above-described objections and to that end the invention is characterized in that the plug, at the end facing away from the drive-in end, contains a separate clamping sealing means for engaging the inner circumference of the recess, the outer radial dimensions of the sealing means and of the plug being such that complete sealing is acquired and maintained without damaging the wood after the plug has been driven-in into the recess, even in the event of high pressure-build-up in said recess.
In several embodiments of the present device the plug can move as a kind of hinge, by which the plug always flushes with the surface of the wood without drilling, perpendicular to said wood surface, having to take place. Two spring, sawtooth-shaped clamping means with different diameters, of which the sloping surface forms an angle smaller than or equal to 45.degree. with the horizontal, are applied, said spring clamping means deforming when they are driven-in into the wood, as a result of which warping of the plug is prevented. When applying a clamping jacket good sealing is obtained before the ampulla is crushed and its contents are released. The use of a clamping jacket with or without a cap, and provided with a tapered drive-in surface, serves for a seal between the transition of two recesses with different diameters. An O-ring, which is arranged in a circumferential groove of the plug, is used for sealing in hard types of wood and for wood weakened by attack. By slightly countersinking the plug with ampule or an impregnated plug, the finishing operation can take place by means of a round wooden disk that can follow the surface of the wood, thus preventing the plugs from becoming visible. The difference between the outer diameter of the plug and the inner diameter of one of the drilled holes is 1 mm at the most. If this difference in diameter should be larger than 1 mm, then cracks will appear in the wood and premature glass-breakage will occur when driving-in takes place. The same type of disk is applied to each type of wood, so that, especially when using transparant paint, which causes the structure of the wood to remain visible, an esthetic fi
REFERENCES:
patent: 2570588 (1951-06-01), Nylund
patent: 3896627 (1975-07-01), Brown
patent: 4055051 (1977-10-01), Finney
patent: 4322183 (1982-03-01), Ciavatta
patent: 4516886 (1985-05-01), Wright
patent: 4518292 (1985-05-01), Calandria
patent: 4555206 (1985-11-01), Sweeney
patent: 4611954 (1986-09-01), Cassidy
patent: 4693652 (1987-09-01), Sweeney
Hoag Willard E.
Kaplan Blum
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