Conveyors: power-driven – Conveyor for changing attitude of item relative to conveyed... – By conveying randomly faced items and turning items to...
Reexamination Certificate
2000-01-05
2001-08-21
Ellis, Christopher P. (Department: 3651)
Conveyors: power-driven
Conveyor for changing attitude of item relative to conveyed...
By conveying randomly faced items and turning items to...
C198S532000, C198S560000, C425S083100, C264S108000
Reexamination Certificate
active
06276511
ABSTRACT:
The invention relates to an apparatus for the alignment and depositing of elongate particles containing lignocellulose and/or cellulose and provided with at least one binder, such as wood chips, wood fibers or the like, on a continuously moved support to form a mat for the subsequent manufacture of boards, comprising a metering hopper containing such particles, a unit for the transfer of the particles to an orientation unit which is arranged above a continuously moved support, with the spacing between the orientation unit and the continuously moved support lying higher than the upper side of the mat to be formed.
An apparatus is known from the German patent specification 27 34 403 which serves for the alignment of particles (strands) containing lignocellulose and provided with a binder, such as wood chips, wood fibers or the like, which, having been brought onto a continuously moved support, form a mat, the particles of which are aligned substantially parallel to one another and also extend in the direction of movement or transverse to the direction of movement of the continuously moved support, the apparatus comprising a plurality of thin guide surfaces the mutual, equal spacings of which are smaller than the length of the particles to be aligned and the lower edges of which lie higher than the upper side of the mat to be formed and which are movable such that each guide surface is movable in the opposite direction relative to the two adjacent guide surfaces. A plurality of mutually spaced apart projections protrudes beyond the upper marginal edge of each guide surface in the same plane, with the thickness of the projections being the same as the thickness of the guide surface. These projections are formed as regular squares with two parallel edges and an upwardly disposed upper edge parallel to the marginal edge and/or as triangles with an upwardly disposed point. In this way a situation is admittedly achieved in which those particles which first bridge the upper edges of two or more moving guide surfaces are turned in an arc and then drop onto the continuously moved support aligned parallel to one another between the guide surfaces; however, there exists at least the danger of blockages and the danger of damage to the particles.
A differently constructed device for the alignment of wood particles (strands) over the transverse width of a moved support is known from the German laying open print 2 523 515. This device includes a pre-orientation unit which has a plurality of upright ribs and also a drum with wooden strand orientation guides mounted on its outer sheet metal periphery and a capture device which holds the wooden strands captured between an arc-like jacket and a plurality of spaces, each formed by the peripheral surface of the drum and a pair of sheet metal guide surfaces, until they are released at a predetermined point in order to be able to fall aligned parallel to one another onto a moved support on which they are deposited transverse to its direction of movement. The throughput and the degree of orientation of the particles are however not satisfactory with this arrangement.
The invention is based on the object of so designing an alignment apparatus of the initially named kind that the degree of orientation of the particles can be improved with a high throughput and without damaging the particles, with disturbance-free operation.
In accordance with a first embodiment of the invention provision is made for solving the underlying object that the orientation unit consists of a plurality of compartmented rolls arranged spaced apart at right angles to the direction of the movement of the continuously moved support in an at least substantially horizontal plane and rotating opposite to the direction of movement of the continuously moved support, the alignment surfaces of the compartmented rolls which bound the individual compartments and are made air-impermeable being of curved and/or angled design opposite to the direction of movement of the continuously moved support at least in the region of their free ends.
In accordance with the second embodiment of the invention the solution of the underlying object takes place in that the orientation unit has a plurality of mutually parallel vertical alignment surfaces arranged over the width of the support in the direction of movement of the continuously moved support, with projections projecting beyond their upper marginal edges and with respective neighbouring alignment surfaces being drivable in the opposite direction in such a way that each alignment surface executes superimposed movements both with respect to their longitudinal extent and also perpendicular thereto.
REFERENCES:
patent: 2931076 (1960-04-01), Clark
patent: 3680175 (1972-08-01), Kamp et al.
patent: 4058201 (1977-11-01), Etzold
patent: 4494919 (1985-01-01), Knudson
patent: 4505663 (1985-03-01), Kilpela
patent: 2523515A1 (1976-01-01), None
patent: 2734403A1 (1978-09-01), None
patent: 3731322A1 (1988-03-01), None
patent: 3731322 (1988-03-01), None
patent: 19544866A1 (1997-06-01), None
Iredi Hans-Joachim
Japes Hubertus
Deuble Mark A.
Ellis Christopher P.
Kvaerner Panel Systems GmbH Maschinen- und Anlagenbau
Townsend and Townsend / and Crew LLP
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