Method for forming a filter element专利检索-放射性材料化学元素和化合物专利检索查询-专利查询网

Method for forming a filter element

阅读：774发布：2023-09-12

专利汇可以提供Method for forming a filter element专利检索，专利查询，专利分析的服务。并且Method and apparatus for forming a filter element especially useful for filtering noxious and radioactive gases. The element is composed of a ribbon of sheet filter material folded into reverse pleats. Bands or straps of flexible material are fixed to the crests of the folds in the sheet, at each side thereof, and extend longitudinally thereof, in laterally spaced relation. Transverse cuts are made in these strips at intervals regularly spaced along the pleated ribbon. Each cut is between two contiguous crests. The cuts made on one side are offset with respect to those on the other side. The pleated ribbon is then reversely folded at and along each line, to form a filter element of zigzag form. This element is then mounted within a casing having a passageway therethrough for gas to be filtered, to obturate the passageway by sealing the end and side termini of the element to the walls of the casing. The apparatus consists of a machine operating automatically to make the aforesaid cuts. The pleated ribbon is moved in the direction of its length on and over a table. First and second rails extend transversely across the table, above and below it. Each rail carries a cutter assembly, which are spaced in the direction of travel of the ribbon. The assemblies move in unison and each makes a cut on its respective side of the ribbon to sever the bands along correctly spaced lines. At one surface of the ribbon, downstream of the cutters, means are provided to sense the cut previously made on that surface and to thereby initiate a new cutting stroke. The cutters are moved in their return or idling stroke along the rails, out of contact with the bands and the ribbon.，下面是Method for forming a filter element专利的具体信息内容。

权利要求

1. The method of forming a filter element from a ribbon of sheet filter material, comprising, securing to and along the length of the sheet, at transversely spaced intervals thereacross, and on both surfaces thereof, flexible strips, pleating the sheet and strips as a unit to form reverse bends therein, so that the portions of each reverse bend of the strips are in surface-tosurface contact, securing bands to and along the crests of each said strip to interconnect the crests, at each side of the pleated ribbon, severing the bands on each side of the ribbon, along lines transversely of its length and at predetermined spaced intervals therealong, each line at one side being longitudinally offset with respect to lines at the other side, folding the pleated ribbon along each line, into zigzag form, each fold being opposite and away from the line directly opposite, placing a plurality of channels upwardly facing and in spaced parallel relation, depositing a self-hardening compound into and along each channel, and positioning the folded filter element so that each alternate fold thereof is within a respective channel and enrobed in the compound therein.

2. The method of constructing a filter element, comprising, folding a ribbon of sheet filter material into reverse pleats having alternate crests thereof essentially in respective ones of two parallel planes, affixing a plurality of laterally spaced bands to said crests in each said plane and extending transversely of said crests, severing the bands in one said plane along first spaced lines parallel with and between contiguous crests, severing the bands in the other said plane along second spaced lines parallel with and between contiguous crests, said second lines being offset along the length of the ribbon, each with respect to a sequential pair of said first lines, and folding the pleated ribbon into reverse bends at each said line, to form a zigzag filter element; and securing to each side surface of said ribbon, respectively, first and second strips, the reverse portions of each strip within each fold being superposed in face-to-face contact to thereby determine and maintain the spacing of the folds; and encasing each reverse fold of the filter element in a respective one of a plurality of channels, and sealing each fold in and to its channel.

3. THe method of claim 2, mounting the filter element within a casing having walls defining a passageway for conducting gas therethrough, and sealing the end and side edge termini of the element to said walls to obturate the passageway to movement of solid particles therethrough.

4. The method of claim 1, positioning the terminal end edges of the ribbon in and along respective channels in opposite walls of a casing, and depositing hardenable sealing compound into and along each channel of the casing, to enrobe the terminal end edges of the casing therein.

5. The method of claim 4, and applying sealing compound to and along the side terminal edges of the ribbon to thereby seal the same to respective ones of two other opposite walls of the casing.

说明书全文

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Method for forming a filter element

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