Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1998-11-05
2001-03-20
Ball, Michael W. (Department: 1733)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S297000, C493S210000, C493S243000
Reexamination Certificate
active
06203650
ABSTRACT:
BACKGROUND OF THE INVENTION
Method for making an airtight, flexible cell for enclosing electrical switching apparatus in the application of a door edge safety strips is disclosed. The illustrated technique describes a method which includes a series of steps which may be applied to the raw sheet material used in producing the airtight cell which reduces the number of steps necessary to encase the switching apparatus within the airtight cell, simplifying the folding operations required to produce a seam to enclose the switching apparatus. The method provides for the use of three independent sheets of material which are ultimately fastened to each other as described using radio frequency heating apparatus to provide the fastening means of the material used to create the airtight cell. A method of manufacturing airtight cell in the prior art is shown in Miller, U.S. Pat. No. 4,487,648, in which is illustrated a technique for a series of steps which are applied to raw sheet material which reduced the number of folding operations required to produce a seam. It would be appreciated by review of such prior art that an improvement consists of the shape alteration of the sheet of material used to form the end of one side of the cell along its longitudinal axes. The improved shape reduces the number of steps necessary to fasten a seam by eliminating one step.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a manufacturing method for an airtight cell which is utilized to encase a door edge safety switch mechanism. The disclosed invention reduces construction time, manufacturing costs and increases the integrity and reliability of the seals used to form the airtight cells of the invention. The disclosed invention utilizes three pre-sized piece of materials which utilizes radio frequency welding in the preferred embodiment. Two of the sheets of materials are used to construct suitable airtight, sealable ends at the opposing longitudinal end of the third piece of material used to form the generally rectangular shape of the final airtight cell sealed by said radio frequency means.
REFERENCES:
patent: 1385831 (1921-07-01), Hulbert
patent: 1950104 (1934-03-01), Ewers
patent: 3722782 (1973-03-01), Collie
patent: 4487648 (1984-12-01), Miller
Ball Michael W.
Famiglio & Associates
Famiglio, Esq. Robert B.
Piazza Gladys
LandOfFree
Method for manufacturing an airtight cell for enclosing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for manufacturing an airtight cell for enclosing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing an airtight cell for enclosing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2470098