Peter David Alexander Bearne,Leon Edward Evans,Matthew Roger Stephenson,Craig Robert Prentice,Bernard Tsz Lun Ip,Tony William Spear,Mark McLaren,Roheet Patel,Brad Michael Howarth,Jonathan David Harwoo
申请号:
GB201318336
公开号:
GB2503843B
申请日:
2012.04.13
申请国别(地区):
GB
年份:
2016
代理人:
摘要:
A mask assembly has a first upper portion movably connected to a lower portion. At least a portion of the first upper portion (154) is configured to roll so as to overlie at least a portion of a second upper portion (130) when a first boundary of the first upper portion is moved towards a second boundary of the second upper portion