Abstract: A removable flexible roller assembly (10) broadly comprises a rigid and rotatable cylindrical core (200) having a plurality of longitudinal slots (214) and at least one radial slot (216), a resilient roller (202) operable to longitudinally slide along the core (200) and having a plurality of internal longitudinal splines (226) that slide into the longitudinal slots (214) of the core (200), thereby preventing rotation of the roller (202) with respect to the core, and a retaining ring (218) operable to selectively fit into and extend radially from the radial slot (216) of the core (200), thereby selectively preventing the roller (202) from sliding substantially with respect to the core (200).

Abstract: Battery plate envelopes include a sheet of porous film material having a folded widthwise bottom edge and overlapped lateral edges to thereby form a pocket for receiving a battery plate therein. The overlapped lateral edges are joined to one another by a lengthwise extending series of discontinuous joining regions with adjacent ones of the discontinuous joining regions being separated by respective unsealed regions. These unsealed regions thereby establish respective lateral channels through which fluid (e.g., electrolyte employed in a wet storage battery) may pass to the interior pocket, and hence to the battery plate. The discontinuous joining regions are most preferably formed by passing the sheet material through the nip between opposed joining rings, each of which is provided with a series of triangularly-shaped teeth with smooth land areas formed between adjacent teeth series.

Abstract: Battery plate envelopes include a sheet of porous film material having a folded widthwise bottom edge and overlapped lateral edges to thereby form a pocket for receiving a battery plate therein. The overlapped lateral edges are joined to one another by a lengthwise extending series of discontinuous joining regions with adjacent ones of the discontinuous joining regions being separated by respective unsealed regions. These unsealed regions thereby establish respective lateral channels through which fluid (e.g., electrolyte employed in a wet storage battery) may pass to the interior pocket, and hence to the battery plate. The discontinuous joining regions are most preferably formed by passing the sheet material through the nip between opposed joining rings, each of which is provided with a series of triangularly-shaped teeth with smooth land areas formed between adjacent teeth series.