Gasket adhesion test grip tool

Details Gasket adhesion test grip tool Gasket adhesion test grip tool

1999-03-18

2001-03-13

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

C073S856000, C029S758000

Reexamination Certificate

active

06199433

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to gaskets used to seal panels, doors or cabinet frames, in general, and to “Hollow D” gaskets commonly employed to seal against leakage of electromagnetic radiation from enclosed electronic equipment, and against the incursions of snow, sleet and rain into the housings where such equipment is operating, in particular.
2. Description of the Related Art
As is well known and understood, such gaskets are commonly employed in housed Personal Communication Systems and similar cellular Base Stations, and are typically of a type having an adhesive strip on its back surface that is rolled against the door and/or frame in sealing the housing. As is also appreciated, need frequently arises to maintain or service the electronic equipment within the housing, resulting in the necessary repetitive opening and closing of these various panels, doors and cabinets. In use, however, it has been found that the gaskets do not adequately adhere to the edge surface—frequently because the pressure applied when initially installing the gasket is improper. That is, when an insufficient amount of pressure is applied through the conventional type of roller employed, there is an insufficient contact between the edge surface and the adhesive strip on the back of the gasket. Conversely, applying an excessive amount of pressure damages the gasket itself. In both these instances, a very real tendency exists for the gasket to eventually peel away from the panel, door or cabinet frame involved.
Considering the problem, a realization became apparent that something was needed to verify that the wetting of the “Hollow D” gasket adhesive was sufficient, and in a non-destructive manner. In other words, something was required other than merely grabbing the side areas of the gasket and pulling upwards until the adhesive tore away, as that obviously destroyed the usefulness of the gasket.
SUMMARY OF THE INVENTION
As will become clear from the following description, a gasket adhesion test grip tool which satisfies this requirement operates to apply an upwards perpendicular force upon the adhesive area of the gasket, along with a design profile which is able to verify the wetting along the entire width of the adhesive. As will be seen, the dimensions of the test grip tool are selected so as to cooperate in this manner with the various widths of gaskets used for the sealing purpose.
Thus, and in accordance with the invention, a gasket adhesion test grip tool includes a pair of pliable surfaces having upper portions fastened together and lower portions spaced apart a distance at least equal to the width of the “Hollow D” gasket. As set forth, each of the upper portions are symmetrical, and couple with a force measuring gauge for the upwards pulling on the gasket which is positioned at a location over the adhesive strip and equidistant between the side areas of the gasket. With each of the pliable surfaces having facing ends at their lower portions separated by a distance equal to or greater than the width of the adhesive carrier, a perpendicular upward force can be applied to verify the wetting of the adhesive by the gauge, without going so far as to potentially damage the gasket.
To assure an accurate reading of the verification obtained with the gauge, included apertures on the upper surface portions are arranged colinearly, with each being located at a point equidistant from the facing ends of the lower surface portions. In accordance with the preferred embodiment set forth, furthermore, the pair of pliable surfaces are designed substantially symmetrical both in configuration and in dimension—and, so as to facilitate manufacture of the test grip tool and accuracy in its deployment, the pliable surfaces are fabricated to be substantially mirror images of one another. Any manner of fastening the two surfaces together at their upper portions fall within the scope of the invention, as described, whether it be by a tab-and-lock fastening as illustrated, or by a pair of #2 or #4 screws (or otherwise) which join the pliable surfaces together—so long as the fastening method aligns the two surfaces and their apertures to be co-linear in ascertaining the true, accurate reading of the force exerted by the adhesion, and the sufficiency of the wetting of the gasket adhesives along the edge surface frame or substrate.


REFERENCES:
patent: 4583287 (1986-04-01), McDevitt et al.
patent: 4605256 (1986-08-01), Stokoe
patent: 4660281 (1987-04-01), Omand
patent: 4787139 (1988-11-01), Sweet

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