Filters
AssigneeFram Europe Limited
InventorRobert S. Mules
Life of this patent
Estimating the term…
Abstract
A replaceable filter cartridge has a pleated paper filter medium mounted within a frame or casing having a closed side and an open side, the open side being covered by a removable protective tray or lid the internal shape of which has been used in manufacture for moulding a sealing surface onto the periphery of the frame or casing, the closed side of the frame or casing being provided with a perforated portion which is also removable for use of the filter cartridge.
Claims3
In a combination filter cartridge and shipping tray for protecting the filter cartridge, said filter cartridge comprising an array of transversely folded pleats having a pair of opposite ends, the ends of each of said pleats being sealed, a perimetrical strip of sealing material extending around said array for sealing said filter cartridge in use, said shipping tray having an upstanding side wall extending around said cartridge and a raised center portion cooperating with said side wall to define a trough extending around the perimeter of said tray, said trough molding said sealing material into a predetermined shape, the upstanding wall of said tray defining a cavity receiving said filter cartridge and permitting the latter to sealingly engage with the sealing material in said trough when the filter is manufactured whereby the sealing material hardens into a seal carried on said cartridge when the tray is removed from the cartridge, said tray protecting both said seal and said array of pleats, and a protective frame enclosing at least a portion of said array of pleats, said frame including a perimetrically extending portion projecting from said pleats, said projecting portion being embedded in said sealing material.
Dependencies are inferred from the claim text.