A method for fabricating a funnel, a tool for carrying out the method, and a funnel of flat material, more particularly of plastic-coated paper. A receptacle for a pulverulent and/or liquid medium includes a funnel disposed in a pouring or discharging region. A blank of flat material is shaped to a
A method for fabricating a funnel, a tool for carrying out the method, and a funnel of flat material, more particularly of plastic-coated paper. A receptacle for a pulverulent and/or liquid medium includes a funnel disposed in a pouring or discharging region. A blank of flat material is shaped to a funnel-shaped sleeve having an outlet opening, an inlet opening, and an opening angle, and the funnel shaped sleeve is swaged in at least one subregion to effect enlargement of the opening angle.
대표청구항▼
1. A method for fabrication of a funnel from flat, non-porous material comprising shaping a blank of flat, non-porous material to form a funnel-shaped sleeve comprising an outlet opening, an inlet opening, and an opening angle, and reducing the funnel-shaped sleeve in at least one subregion to effec
1. A method for fabrication of a funnel from flat, non-porous material comprising shaping a blank of flat, non-porous material to form a funnel-shaped sleeve comprising an outlet opening, an inlet opening, and an opening angle, and reducing the funnel-shaped sleeve in at least one subregion to effect enlargement of the opening angle. 2. The method as defined in claim 1, wherein reducing comprises constricting at least one region of said funnel-shaped sleeve adjoining said outlet opening such that a substantially cylindrical outlet region is created. 3. The method as defined in claim 1, wherein reducing comprises securing the funnel-shaped sleeve between two complementary tool components that are capable of moving relatively to each other in an axial direction of the funnel-shaped sleeve and shaping the funnel-shaped sleeve in the axial direction by advancing movement of at least one of the tool components. 4. The method as defined in claim 3, further including providing the at least one of the tool components with recesses and forcing the flat, non-porous material into the recesses during reducing. 5. The method according to claim 1, further including turning over a region of said outlet opening of the flat, non-porous material such that said outlet opening is stiffened. 6. The method as defined in claim 5, wherein the turning over is carried out at least partially in a common method step also involving the reducing of said funnel-shaped sleeve. 7. The method as defined in claim 5, further including providing recesses in said blank of flat, non-porous material for relieving stresses during said turning over at an edge of said blank of flat, non-porous material that forms said outlet opening following shaping of said funnel-shaped sleeve. 8. The method as defined in claim 5, further including sealing said outlet opening. 9. The method as defined in claim 1, further including turning over the flat, non-porous material in a region of the inlet opening such that a substantially cylindrical edge is created. 10. The method as defined in claim 9, further including providing the cylindrical edge with grooves. 11. The method as defined in claim 9, further including securing the funnel-shaped sleeve between at least two complementary tool components capable of moving relatively to each other in an axial direction of said funnel-shaped sleeve and shaping the funnel-shaped sleeve by an advancing movement of at least one of the at least two complementary tool components, thereby creating an edge turnover on the flat, non-porous material in a region of said inlet opening. 12. The method as defined in claim 11, further including performing a rotary movement about a longitudinal axis of the funnel-shaped sleeve with at least one of said tool components. 13. The method as defined in claim 1, wherein the blank of flat, non-porous material is a pre-fabricated ring segment and the method further includes placing said blank of flat, non-porous material on a wrapping mandrel and joining ends of the blank of flat, non-porous material. 14. A method for fabrication of a funnel comprising: providing a blank of flat, non-porous material;shaping the blank of flat, non-porous material to form a funnel-shaped sleeve comprising an outlet opening and an inlet opening, and a subregion of the funnel-shaped sleeve, with the subregion forming an opening angle defined by an angle of the funnel-shaped sleeve at the subregion relative to a central longitudinal axis of the funnel-shaped sleeve; andreducing the funnel-shaped sleeve in the subregion to effect enlargement of the opening angle of the subregion. 15. The method as defined in claim 14, wherein the subregion adjoins the outlet opening and reducing comprises constricting the subregion, and further including forming the outlet region into a substantially cylindrical region. 16. The method as defined in claim 14, wherein reducing comprises securing the funnel-shaped sleeve between two complementary tool components, and further including moving the two complementary tool components relatively to each other in an axial direction of the funnel-shaped sleeve, shaping the funnel-shaped sleeve in the axial direction by advancing movement of at least one of the tool components, providing the at least one of the tool components with recesses, and forcing the flat, non-porous material into the recesses during the reducing. 17. The method as defined in claim 14, further including simultaneously reducing said funnel-shaped sleeve and turning over a region of the outlet opening of the flat, non-porous material such that the outlet opening is stiffened. 18. The method as defined in claim 14, further including providing recesses in said blank of flat, non-porous material.
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이 특허에 인용된 특허 (3)
David Rubin, Barrel-like container with cover designed for complete drainage.
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