A balloon tying device of the invention includes a dowel having a slotted end and a hole whose axis extends transversely to the dowel in the slot. A particular feature of the invention involves a stepping-in of one side of a balloon-tying slot relative to the other, to create a land for facilitating...http://www.google.co.uk/patents/US6082785?utm_source=gb-gplus-sharePatent US6082785 - Balloon tier and method
