Abstract: Abstract of the Disclosure: A process for tanning leather comprises using for this purpose compounds of the general formula I ##STR1## where m is 0 or 1, and the radicalsR are independently of each other C.sub.1 -C.sub.18 -alkyl, which may be substituted by hydroxyl or carboxyl and/or interrupted by oxygen atoms, or else one of the radicals R is a radical of the formula ##STR2## where R.sup.1 is alkylene, which may be substituted by hydroxyl and/or interrupted by oxygen atoms.

Abstract: An apparatus for ordered feeding of workpieces on a table in a row along a feed path defining a plane and having a longitudinal direction to and from workpiece processing machines and the like having a base, two sets of leaf springs spaced apart from each other in the longitudinal direction of the feed path, each of the sets of leaf springs extending in a plane which is perpendicular to the feed path and is connected at portions adjacent respective ends thereof to the base and the table, respectively, the corresponding portions of each of the sets of leaf springs being alternately connected to the base and to the table; and vibratory drive means for applying forces to the table which are parallel to the feed path, the sets of leaf springs oscillating only in a plane parallel to the feed path and where the drive means imparts a speed of displacement greater than the speed of return of the feed path caused by the sets of leaf springs.

Abstract: A device for the bunkering and sorted feeding of small parts, particularly to processing machines, by which the small parts are removed from a bunker space in the bottom area of the bunker, which bunker space is refillable from the top, and via an intermediate inserted lifting unit are fed into the inlet prechamber of a sorting stretch, the latter being formed for example in the shape of a vibrating conveyor. The bunker, lifting unit and sorting section are accommodated in a container, such that the lifting unit rends with the upper end of the lifting device in front of the inlet prechamber of the sorting stretch. The subspace is partitioned-off relative to the bunker space, and the lifting unit is arranged in the subspace of the container, the lifting unit conveying-up rises transversely relative to the bunker outlet opening. The sorting stretch extends on the upper longitudinal edge of the container in a direction opposite to the bunker outlet direction.