Abstract: In an electric storage battery having cell elements including compressed fibrous interelectrode separators, a retainer plate engaging the walls of the battery container for holding the cell element under compression.

Abstract: A lead acid storage battery and method of making same wherein a plurality of plate lugs are welded to a plate strap while a bed of insulating particulates (e.g., glass beads) at the roots of the lugs underlie the strap during welding to insulate the battery case from heat and prevent molten lead from entering the container.

Abstract: Bipolar battery and method of making intercell connections between adjacent cells thereof including a container having an intercell partition a section of which is thicker than the remainder of the partition. The thickened section has an opening therethrough receiving the intercell connectors, which opening has a mouth at each end thereof confronting one of a set of adjacent cell compartments. Barriers are provided contiguous the mouths of the opening and define therebetween a region in the opening for receiving sealant injected thereinto. The barriers confine the sealant to the region and prevent it from exuding into the adjacent cell compartments. In one embodiment, the barriers comprise rails molded onto the bipolar electrodes. In another embodiment, the barriers comprise compressed glass mats.

Abstract: The subject invention relates to photopolymerizable compositions useful for making plastic printing elements for use in photolithography and other photomechanical processes. The photopolymerizable compositions comprise an aqueous mixture of a water-insoluble resin, a water-soluble binder, a crosslinking agent, and a photopolymerization initiator having an alpha-keto ester linkage. In particular, photopolymerization initiators include oxalic acid, sodium oxalate, potassium oxalate, lithium oxalate and urea oxalate. The printing plates prepared from the compositions herein disclosed have improved ink receptivity, good retention of such ink, receptivity even after long continued use, greater durability and excellent binding qualities.