Patent NZ-717916-A (NZ)
Title: Tree treatment capsule
Inventor: MERVING HANS A K
IPC: B65D83/00
Filed: 2014-10-29
Abstract: This disclosure generally concerns the administering of treatment substance to porous elements in general, such as wood, and in particular to plants, trees etc. by means of a capsule for delivering such substance to the interior of the element. Generally, with all prior art solutions within this field it is a matter of great concern to maintain the capsule leak proof outwardly, towards the open end, and in particular to provide improved means and/or methods for administering treatment substance to porous elements. With this in mind, the present invention provides a capsule for insertion into a bore of a porous element to apply treatment substance to the interior of the element, and having a container, with at least one internal cavity for receiving treatment substance therein, a releasably closed first insertion end and an outer stop flange, and a plug received in and fixed to the container through a common interconnecting land, wherein a first container shank portion extending from the first insertion end of the capsule and up to the area of the interconnecting land has a uniform generally cylindrical shape, and a second container shank portion extending away from said first container shank portion, from the area of the interconnecting land towards the outer stop flange, at least at an inner surface thereof has an outwardly slightly diverging, conical shape and at an outer surface thereof, separated a short distance from the outer stop flange, has a first circumferential bevelled edge serving as a transition to an outer increased diameter section. The present also provides a method for applying a treatment substance to the interior of a porous element comprising the steps of providing a treatment substance capsule including a container having a releasably closed end, an internal cavity, treatment substance disposed in said internal cavity, and a plug fitted in said container to retain said treatment substance in the internal cavity, forming at least one bore into the interior of said element; inserting the capsule into said bore, and applying driving force to said plug to move it into the cavity, causing the releasably closed end of the container to open, thereby releasing treatment substance from said internal cavity by permitting it to pass from said internal cavity and into said bore; characterized by: first inserting the capsule with said closed end and a first container shank portion into the bore, acting as a guide; then driving the capsule with the plug further into the bore so that a second container shank portion of the container fits snugly in the bore; said second container shank portion at least at an inner surface having an outwardly slightly diverging, conical shape and at an outer surface, separated from an outer stop flange, having a first circumferential bevelled edge serving as a transition to an outer increased diameter section, so that the container past the first circumferential bevelled edge has an outer diameter exceeding the diameter of the bore; and then driving the capsule with the plug further into the bore so that the outer section of the container enters the bore, thereby causing the outer increased diameter section and the outer stop flange to be rotated inwardly towards the plug to seal any gap there between.