| 摘要 |
<p>Application Of: Richard W. Elbers, Jr. For: Corrugated Spacers For Pleated Air Filter Media And Method Of Fabricating The Same An improved corrugated sheet aluminum spacer for use in pleated media air filters is disclosed. The spacers are folded in zig zag fashion along one edge in a succession of V formations having a first height and width, and along the opposite edge in a succession of V formations having both heights and widths approximately one-fifth of the first height and width. Since the fold lines are substantially parallel, there are five V formations within a given width of the opposite edge for each one along the first edge, the fold lines of the intermediate V formations extendinq from the second edge only a portion of the distance to the first edge, but preferably about 90% of the length of the sheet. The V formations are formed by passing the aluminum between a pair of rolls with forming blades having overlapping edges which engage the sheet. The height or amplitude of the V formations at the small end is on the order of .03 to .04 inches in aluminum sheet having a thickness of 1 to 2 mils, preferably .0015 inches. The 5 to 1 ratio of V formations along opposite edges is achieved by polishing the surfaces of the forming blades which contact the sheet to a degree providing surface irregularities of not more than about 10 microinches, preferably in the range of 4 to 8 microinches. The method of fabricating such spacers is also disclosed.</p> |
