Method of making a filter
AssigneeRobert Bosch GmbH
InventorHeinz Lammermann
Life of this patent
Estimating the term…
Abstract
A filter element is fitted into a filter can and a mass of hot-melt adhesive between the filter element and the can is thermally activated and allowed to cure to hold this filter element in place. A bead of hot-melt adhesive is applied to the rim of the can and the edge of a cover is applied over this bead which may be heated to its softening range. Thereafter the rim of the can is bent over the edge of the cover and this bent-over rim is heated to the melting point of the hot-melt adhesive so as to secure the two together once the hot-melt adhesive has cured.
Claims9
A method of closing a metal filter can comprising the steps of sequentially:
- providing around an annular shoulder adjacent the rim of an open side of said filter can an annular line of a hot-melt adhesive in nonliquid form;
- applying a metal cover over said open side with its edge in contact with said annular line of adhesive in nonliquid form;
- bending over said rim around said edge and thereby pressing said edge against said line and through said line against said shoulder;
- heating the bent over rim to melt said adhesive;
- and
- curing said adhesive.
Dependencies are inferred from the claim text.