Device for attaching a dispenser member to a receptacle

Abstract

An attaching ring or fixing ring is provided for attaching or fixing a dispenser member to a neck of a receptacle containing a substance to be dispensed. The ring is annular and has a bottom portion and a top portion. In a preferred embodiment, the bottom portion includes snap-fastening tabs for fixing the ring to the neck. The top portion includes an opening for the dispenser and a surrounding structure for securing the dispenser member to the neck. The top portion further includes at least one guide wall element extending parallel to the longitudinal axis of the dispenser member and around the periphery of the fixing ring substantially in line with the snap-fastening tabs. A hoop can be provided for preventing the tabs from splaying apart. The hoop can include an internal projection, such as a vertical rib or a thread.

Description

[0001]This is a reissue of U.S. Pat. No. 6,543,648, issued on Apr. 8, 2003 from U.S. patent application Ser. No. 10 / 136,211, filed May 1, 2002. [0002]This is a continuation of U.S. patent application Ser. No. 09 / 654,018, filed Sep. 1, 2000 now U.S. Pat. No. 6,409,049, which is a continuation of U.S. patent application Ser. No. 09 / 099,684, filed Jun. 18, 1998, now U.S. Pat. No. 6,186,359, issued Feb. 13, 2001, which is a divisional of U.S. patent application Ser. No. 08 / 725,934, filed Oct. 7, 1996, now U.S. Pat. No. 5,799,810, issued Sep. 1, 1998, which is a divisional of U.S. patent application Ser. No. 08 / 311,041, filed Sep. 22, 1994, now U.S. Pat. No. 5,562,219, issued Oct. 8, 1996.[0003]The present invention relates to a device for attaching, and to a method for attaching, a dispenser member, such as a pump or a valve, to the neck of a receptacle containing a substance to be dispensed.BACKGROUND OF THE INVENTION[0004]It is known that a dispenser or dispenser member can be attache...

AI Technical Summary

Benefits of technology

[0049](4) exerting a first force F1 on the hoop which bears against the guide wall of the fixing ring via the bottom end of the projection and which pushes the fixing ring against the neck of the receptacle, the snap-fastening means first splaying part under the effect of the force F1 prior to snap-fastening to the flange of the neck of the receptacle; and

[0050](5) exerting on the hoop a second force F2 greater than the first force F1, the second force F2 being sufficient to cause the hoop to move relative to the fixing ring to a final position so as to further engage the fixing ring in a force fit with a portion of the hoop being located adjacent the snap-fastening means, the hoop thereby preventing the snap-fastening means of the fixing ring from splaying apart.

Problems solved by technology

Conventional attachment devices suffer from certain drawbacks.

In particular, when the force exerted on the hoop is not uniformly distributed around its periphery, there is a risk of the hoop being forced away from its vertical position in the assembly machine so that the hoop becomes cocked or slanted and engaged obliquely on the fixing ring, thereby preventing proper overall assembly.

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