Uhu Gmbh

Uhu Gmbh & Co. Kg

Hans-Martin Kapsa

Wilhelm Werhahn

Hans Halm

Werner Panter

Klaus Eichler

In the outer sleeve there runs a threaded spindle which is mounted in a bearing sleeve ( ) and on which a piston ( ) is movable up and down. The outer sleeve ( ) is in relation to its inner diameter A considerably longer than with known glue sticks. The ratio of the inner diameter A of the outer sleeve ( ) to the length A of the part of the outer sleeve which serves for receiving a rod-like adhesive mass ( ) here lies in the region of 1:6 to 1:15. This however according to the invention demands that the threaded spindle is configured such that it simultaneously serves as a conveyor worm. Thanks to the special configuration of the piston ( ) is spite of the great length of the threaded spindle there is achieved a bending-breakage stabilization.

Glue stick

A new method fills a dispenser with cyanoacrylate adhesive from the rear. The container is sealed by a pressed-in base section (4). The latter has a vent opening which can be sealed, preferably by a plug (68) pre-mounted on it. Preferably the contacting surfaces of the container and this base have an oval shape. In this novel method, the container is first filled, while the end is still open. The base is then pressed in, sealing it onto the container. In so doing, the air displaced, is released through the base vent. During the final phase of pressing-in, the vent is plugged, irreversibly sealing it. Also claimed is an adhesive dispenser, essentially as described, with further preferred detail of the seals, the pipette construction of the container and a slot valve in the plug unit. USE--A dispenser filling method and dispenser, especially suitable e.g. for a super glue. ADVANTAGE--This method allows the container to be filled without the base in place, hence avoiding filling through a very fine hole or nozzle. The latter course would involve a danger of air entrainment and/or foaming. Air per se has no harmful effect, but its water vapor content causes undesirable polymerization of cyanoacrylate adhesives. The method makes a leakproof and secure fastening at the base, avoiding welding or adhesion. A simple, low cost mechanical stage is all that is required. Further manufacturing advantages of the base and plug are detailed in the text.

Adhesive dispenser with rear filling structure

The invention relates to an adhesive stick having a plunger anchoring the stick composition and a sleeve surrounding the stick composition, in which the propelling device for the upward and downward moving of the stick composition, which device at the same time serves as the actuating element, is formed together with the sleeve and the plunger as a one-part injection moulding. This propelling and actuating element (1) is designed in the form of a plate and is provided with lateral reinforcing webs (2) and is bonded on both sides to the plunger plate (0); it has at the vertex a pressure plate (3). Anchorage elements for the stick composition on the plunger plate (0) are designed in the form of bristles (6).

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Ottersweier, Germany

Hans-Martin Kapsa