CPC B65D 57/003 (2020.05) [B29C 45/00 (2013.01); B29C 45/0046 (2013.01); B29C 45/2602 (2013.01); B29L 2007/002 (2013.01); B29L 2031/712 (2013.01); B65D 71/0088 (2013.01); B65D 2571/00043 (2013.01); Y10T 428/24479 (2015.01)] | 17 Claims |
1. A method of forming a pad, said pad comprising a substantially flat sheet having first and second opposite substantially planar faces, and the pad further including at least one raised formation on at least one of the faces, wherein the method comprises:
providing a mould having at least one injection port for a moulding material, said mould defining a mould space having a narrow region and a wide region, the narrow region being narrow relative to the wide region, wherein the mould has first and second mould parts to provide first and second opposite sides of the mould space, each of the first and second mould parts defining a respective recess to provide the relatively wide region in the mould space, and each recess having a main recess region and an apex region, wherein the distance between opposite sides of the mould space at the wide region is substantially 30% greater than the distance between opposite sides of the mould space at regions devoid of the aforesaid wide region;
injecting the moulding material into the mould space to fill the narrow region and the wide region;
allowing the moulding material to cure and thereafter releasing the so formed pad from the mould;
wherein the recess is substantially frustoconical in shape.
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