DOCUMENT FILE RING MECHANISM WITH IMPROVED BASE PLATE

The ring mechanism (1 ) of a document file (2) comprises a base plate (10), on which two stable pins (11, 12) are fixed and two pivotable pins (144, 145) are pivotally attached, which are by means of a clamping set (2) either pressed towards said stable pins (11, 12) or temporarily displaced apart from said stable pins (11, 12), wherein said base plate (10) is adapted for attachment onto the inner side (2209 of a cardboard cover (22) of each document file (2) intended for archiving paper sheets and for such purposes comprises corresponding bores (181, 182, 183, 184) adapted to receive rivets or any other suitable attaching members. The aim of the invention is to create such mechanism (1), which could without increasing the manufacturing costs be efficiently prevented against undesired influences of each corresponding cardboard cover (22), to which such mechanism (1) is attached, in particular against the risk of corrosion on the base plate (10) of such mechanism (1) due to permanent contact with hygroscopic cardboard cover (22). Said problem is resolved by arrangement of the circumferential edges (105) of the base plate (10) into the second plane (E2), which is at a pre-determined distance (d), which preferably corresponds to 0,5 - 1,5 of thickness (t) of the steel strip, of which the base plate (10) is manufactured, spaced apart the first plane (El ), in which the base plate (10) is rest onto the surface on the inner side (220) of the cover (22) of the document file (2). Le mécanisme à anneau (1) d'un classeur (2) comprend une plaque de base (10), sur laquelle deux tiges stables (11, 12) sont fixées et deux tiges pivotantes (144, 145) sont attachées pivotantes, ces dernières étant, au moyen d'un ensemble de serrage (2), soit pressées vers lesdites tiges stables (11, 12) soit provisoirement éloignées desdites tiges stables (11, 12). Ladite plaque de base (10) est conçue pour être fixée sur le côté intérieur (2209) d'une couverture cartonnée (22) de chaque classeur (2) destiné à archiver des feuilles de papier et pour de tels objectifs comprend des trous correspondants (181, 182, 183, 184) conçus pour recevoir des rivets ou tous autres éléments de fixation appropriés. Le but de l'invention consiste à créer un tel mécanisme (1), qui pourrait, sans augmenter les coûts de fabrication, être efficacement protégé contre les influences non souhaitées de chaque couverture cartonnée correspondante (22), à laquelle un tel mécanisme (1) est fixé, en particulier contre