| 摘要 |
812,920. Foil for battery plates; turning. CROMPTON PARKINSON Ltd. Sept. 19, 1956 [Sept. 19, 1955], No. 26749/55. Classes 83 (2) and 83 (3). [Also in Group XXXVI] In producing battery plates, a cylindrical block 1 of lead or alloy is rotated by a mandrel 2, and a tool 3 turns off a sheet or foil 12 which passes through an annealing device 4 to relieve machining stress and a punching device 5 where holes, preferably circular, are formed. The foil moves to a pasting device 7 where the holes in both sides have paste dispensed into them, and a guillotine 8 cuts the foil to the required length. The layout is duplicated, one line producing positive plates and the other negative plates. The lines connect at 13 where separators 14 are interleaved between the pasted plates and formed into a coil 16, which is dried in an oven and fitted into an acid-containing case. The separating material may be chemical filter paper, impregnated with a phenolic or like resin and baked, and may be ribbed to increase the amount of effective acid in the cell. Resins, such as polyvinyl chloride, may be used with or without glass fibre. The coil is produced with the negative strip overlapping the separator at one end and the positive strip the other, for connection purposes. The tool preferably has a cutting angle of 30-40 degrees and the face adjacent the cutting edge is set at 3-4 degrees to a plane tangential to the cylinder at the cutting point. Specification 802,488, [Group XIV], is referred to. |
