1. A folding table, comprising:
two top panels hingedly connected together to form a table top having a top surface and a bottom surface, said table top having a folding action about the hinged connection of the two top panels;
a first pair of legs depending from the bottom surface of the table top, each of the legs in said first pair of legs having a first section and a second section, the first section having a top edge hingedly connected to the bottom surface of the table top and a side edge hingedly connected to the second section, the second section of each leg in said first pair of legs being hingedly connected to the other, the hinged action of the two interconnected second sections folding outwardly and traveling in a plane of symmetry with the folding action of the table top;
a second pair of legs depending from the bottom surface of the table top, each of the legs in said second pair of legs having a first section and a second section, the first section having a top edge hingedly connected to the bottom surface of the table top and a side edge hingedly connected to the second section, the second section of each leg in said second pair of legs being hingedly connected to the other, the hinged action of the two interconnected second sections folding outwardly and traveling in a plane of symmetry with the folding action of the table top;
at least one barb extending from each of said second sections of said first leg and said second leg of said first pair of legs and said second pair of legs, said at least one barb having a base portion and a projection extending therefrom, said projection having a pair of opposed raised shoulders extending laterally therefrom and an engaging face with a recess formed thereon; and
at least one catch on each of said top panels configured and arranged to selectively latch with said at least one barb to lock said top panels to said second sections of said first leg and said second leg of said first pair of legs and said second pair of legs in a deployed state, said at least one catch having a pair of inwardly facing guides to receive the shoulders of the projections of the barb and a locking portion configured and arranged to receive the projection of the barb and cooperate with the recess on the barb to selectively lock the barb to the catch;
whereby the folding table may be collapsed from a deployed state forming a table to a folded state for storage and portability.
2. The folding table of claim 1, further comprising:
a first cut-out on one of the top panels;
a second cut-out on the other of the top panels;
said first cut-out and said second cut-out being symmetrical and complimentary; and
whereby said first cut-out and said second cut-out form a unitary handle when the folding table is in the folded state.
3. The folding table of claim 1, further comprising:
at least one latch on each of said top panels; and
said at least one catch on each of said top panels is further configured and arranged to selectively latch with said at least one latch of the other of said top panels to selectively lock said top panels together in the folded state.
4. The folding table of claim 3, wherein said at least one latch has a base portion and a projection, said projection having a pair of opposed raised shoulders extending laterally therefrom, and said inwardly facing guides of said at least one catch are further configured and arranged to receive said projection and cooperate with said raised shoulders to selectively lock said top panels together in the folded state.
5. The folding table of claim 1, wherein each top panel further includes a back panel secured to the bottom surface of the table top.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for producing a gas diffusion layer for a fuel cell comprising a first step of:
impregnating a conductive porous substrate made of conductive carbon fiber cloth or conductive carbon fiber felt with a first dispersion containing a first fluorocarbon resin having thermoplasticity; and baking said conductive porous substrate at a first baking temperature of not less than the melting point of said first fluorocarbon resin and less than the decomposition temperature of said first fluorocarbon resin to enhance the rigidity of said conductive porous substrate.
2. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 1, further comprising, after said first step, a second step of:
applying a shearing force to a second dispersion containing conductive carbon particles and a second fluorocarbon resin having thermoplasticity; applying said second dispersion onto one surface of said conductive porous substrate; and baking said conducive porous substrate at a second baking temperature of less than the melting point of said second fluorocarbon resin to form a conductive water repellent layer.
3. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 1, wherein, in said first step, said first fluorocarbon resin is at least one selected from the group consisting of tetrafluoroethylene-hexafluoropropylene copolymer and tetrafluoroethylene-perfluoroalkylvinylether copolymer.
4. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 1, wherein, in said first step, said first dispersion is impregnated into said conductive porous substrate such that the amount of said first fluorocarbon resin contained in said conductive porous substrate becomes 0.5 to 4 mgcm2.
5. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 1, wherein, in said first step, said first baking temperature is 250 to 350\xb0 C.
6. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 2, wherein, in said second step, said second fluorocarbon resin is polytetrafluoroethylene.
7. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 2, wherein, in said second step, the weight ratio of said conductive carbon particles to said second fluorocarbon resin in said second dispersion is 20:1 to 1:1.
8. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 2, wherein, said second dispersion is applied onto said conductive porous substrate such that the amount of said second fluorocarbon resin contained in said conductive water repellent layer becomes 3 to 8 mgcm2 in said second step.
9. The method for producing a gas diffusion layer for a fuel cell in accordance with claim 2, wherein, in said second step, the second baking temperature is 250 to 325\xb0 C.
10. A method for producing an electrode for a fuel cell using the gas diffusion layer produced by the production method in accordance with any one of claims 1 to 9.
11. A method for producing a membrane electrode assembly for a fuel cell using the electrode produced by the production method in accordance with claim 10.
12. A gas diffusion electrode for a fuel cell produced by the production method in accordance with any one of claims 1 to 9.
13. An electrode for a fuel cell produced by the production method in accordance with claim 10.
14. A membrane electrode assembly for a fuel cell produced by the production method in accordance with claim 11.