Document file with holding mechanism on file base

摘要

The file has a cover (1), button (2) and spine (3) of plastics. The base carries the holding mechanism (4). The spine is coupled to the cover and base by flap joints of several longitudinally slit bearing sleeves (3) on the spine, cover and base sides (11-13). The sleeves are fitted in direct mutual extension. A bearing spindle (14,15) passes through all respective bearing sleeves. Its thickness is greater than the slit width of the sleeves. Pref. the surrounding angle of the bearing sleeves is approx. 270 deg.. The sleeves are elastically extensible.