| 摘要 |
<p>A head guard, preferably annular brow-band, comprising a longitudinal, preferably annular unit (2) which completely or substantially is made of cellular plastic. In order to ensure that all parts of the head guard provide adequate protection, the cellular-plastic unit (2) has depressions (12, 13) which protrude into the cellular-plastic material alternately from an inner side (14a) and an outer side (14b) respectively, of the unit, which inner side (14a) and outer side (14b) respectively, is adapted to face inwards towards and outwards from the head (15) respectively, whereby the depressions (12,13) define cellular-plastic pads (16) with shock-absorbing properties and extending substantially transverse to the longitudinal direction (L) of the cellular-plastic unit (2) and whereby said cellular-plastic pads (16) and the connecting portions (17) connecting said pads together permit a limited stretching or elongation of the cellular-plastic unit (2) in its longitudinal direction (L) for providing at least one elastic portion (8-11) for adaptation of the size and/or shape of the cellular-plastic unit (2) to the size and/or shape of the head (15). A simple and efficient method for manufacturing the cellular-plastic unit (2), includes pressing heated blades (24, 25) into the cellular-plastic unit (2) to provide depressions (12, 13) therein and bringing warm processing means in contact with other parts of the cellular-plastic unit such that said unit gets a surface which is less porous than the parts thereof lying within said surface.</p> |
