Agitating – Rubber or heavy plastic working – With specified feed means
Patent
1994-01-10
1996-01-23
Simone, Timothy F.
Agitating
Rubber or heavy plastic working
With specified feed means
994501, 99462, 366 77, 366 93, 366143, 425238, 425241, A21C 504, A21C 706, A21C 704, A21C 904
Patent
active
054860482
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to an apparatus for treating dough, in particular for portioning and, respectively, or kneading dough, comprising a drum stepwisely rotatable around a horizontal axis and provided on its periphery with receiving openings for dough portions, at least one treatment member for the dough, a piston in each receiving opening guided within the receiving opening in radial direction of the drum, and a curved restricted guidance for the pistons for radial inward and outward movement of the pistons during at least one phase of the treatment, which restricted guidance guides the pistons inwardly and outwardly, with respect to the radius of drum and is automatically adjustable relative to the drum at least in the phases of stillstand of the drum motion.
Such apparatus are known (for example AT-PS 341 970). Generally they have four rows of receiving openings distributed in equal distances around the periphery of the drum, that means always displaced with respect to each other for 90.degree.. The stepwise advance of the drum causes a rotation of the drum for 90.degree. per step, so that the receiving openings are conveyed from station to station, where the treatment of the dough takes place, for example portioning or kneading. Within the above mentioned known apparatus, a portioning station is disposed at the one side of the drum, at which station the dough is pressed into the receiving openings by means of a pusher member and is portioned by a shearing edge when the drum moves again. Within the region of the summit of the drum a kneading station is provided at which a kneading tool ist disposed that kneads the dough pieces accommodated within the receiving openings into a ball-like shape. At the other side of the drum a deposit station is disposed at which the dough pieces are ejected from the receiving openings by an outward movement of the pistons. This outward movement of the pistons is obtained by the restricted guidance of the pistons which is rotated relative to the drum during the stillstand thereof, the curvature of this restricted guidance effecting the desired outward movement of the pistons at the deposit station. At the same time, during this relative rotation of the restricted guidance, the pistons are retracted at the portioning station, in order to suck-in the dough which has to be pressed-in into the receiving opening. Also at the kneading station a retraction of the pistons takes place during the kneading process, in order to consider that the dough piece requires more and more space during the kneading process. The known apparatus works without any problem as long as the distances for which the pistons are moved forwardly or, respectively, backwardly at the single stations, are not changed for a too great extent. Such a change, however, is necessary at the portioning station, if the dough piece to be weighed there has to be changed with respect to its volume or, respectively, weight, that means, that for example, one must change from the production of smaller dough portions to the production of bigger dough portions or vice versa. For this, it is indeed known from the initially described construction to additionally adjust the restricted guidance relative to the drum by means of an adjustment device, that means, as it were, to change the starting position of the relative movement between restricted guidance and drum. Thereby, at the portioning station a more or less long retraction of the pistons can be adjusted at choice. However, difficulties arise, if this adjustment should be made to a comparatively large extent, because then a considerable change of the said starting position of the restricted guidance is necessary. This change influences the circumstances at the kneading station and at the deposit station so that there the optimal positions of the pistons during the kneading process cannot more be obtained or, respectively, the dough pieces are no more reliably ejected from the receiving openings.
The invention has at its object to im
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