G - Physics – 09 – F
Patent
G - Physics
09
F
40/19
G09F 3/00 (2006.01) A01K 11/00 (2006.01)
Patent
CA 1155655
IMPROVEMENTS IN AND RELATING TO TAGS, PARTICULARLY EAR TAGS ABSTRACT OF THE DISCLOSURE A tag, particularly an ear tag for marking animals such as cattle which have passed an official test, comprises a strip formed into two limbs and a hollow rivet, preferably of brass, perpendicular to one of the limbs, the rivet comprising a stock portion which may be frusto-conical or cylindrical surmounted by a narrower neck portion of reduced wall thickness surmounted by an enlarged head portion preferably in the form of a cylindrical punch having a sharp cutting edge. There is a receiver hole in the other limb of the strip to receive the rivet head and a spring clip, preferably of stainless steel, secured over the receiver hole. As the tag is being closed, the head punches a hole in the animal's flesh, and is forced through the spring clip, after which the head may be splayed outwardly. If an attempt is made to force the limbs apart, the spring clip interacts with the rivet to cause it to break at the neck portion. Preferably there is a shoulder at the top of the stock portion against which the limb defining the receiver hole rests. The rivet may be formed from the material of the strip. A special insert for a tagging tool is also described, this insert having a conical boss set in the centre of a recess into which the head of the rivet is forced. The tag is easy to apply by manual pressure, liable to break if an attempt is made to force it open and easy to check visually for evidence of tampering.
356000
Kilroy Michael M.
Stafford Rodney A.
Kilroy Michael M.
Ridout & Maybee Llp
Stafford Rodney A.
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