Abstract: A filter according to the invention includes a filter body having a cylindrical element having ribs extending radially in which inner surfaces of the ribs are joined with adhesive at the vicinity of the upper edge portion and the lower edge portion a casing that stores the filter body, a relief valve and a check valve that support the filter body, and seal bodies that are formed by photo-curing resin and are provided between an upper surface portion of the element and the relief valve and between a lower surface portion of the element and the check valve. In the element, photo-curing resin is applied to an upper surface portion and a lower surface portion of a cylindrical folded body having ribs extending radially, and after that, a transparent mold is placed on the upper surface portion and the lower surface portion of the folded body, and the photo-curing resin is photo-cured in this condition and a seal body is produced.

Abstract: The invention relates to a heat resistant and oil resistant sealing member. The sealing member has a main body of acrylic rubber and a fixation-preventive layer made of silicone resin or rubber. The fixation-preventive layer prevents the main body from becoming affixed to an opposing member.