Conveyors: power-driven – Conveyor for changing attitude of item relative to conveyed... – By conveyor and means driven for turning successive conveyed...
Reexamination Certificate
1999-07-27
2001-02-20
Bidwell, James R. (Department: 3651)
Conveyors: power-driven
Conveyor for changing attitude of item relative to conveyed...
By conveyor and means driven for turning successive conveyed...
C198S414000, C198S456000, C198S597000
Reexamination Certificate
active
06189677
ABSTRACT:
BACKGROUND OF THE INVENTION
U.S. Pat. No. 3,174,613 describes a conveyor apparatus which includes a plurality of rolls, arranged in rows, between two spaced conveyor belts progressing in identical conveying directions. The axes of the rolls in each row are horizontal and are oriented parallel to one another. The rolls are driven either with the circulating speed of the conveyor belts or with a speed which is 1.4 times higher. The upper, common tangential plane of the rolls is coplanar with the upper face of the conveyor belts. The axes of the rolls of each row may be pivoted jointly about 45° from a basic position in which they are disposed perpendicularly to the advancing direction of the conveyor belts. In the outwardly pivoted position the rolls deliver articles, such as glass panes, to a transverse conveyor belt.
British Published Patent Application No. 2,259,900 describes a conveying apparatus with which articles may be conveyed in one of four selectable directions on an approximately horizontal table. The table is composed of a plurality of side-by-side arranged table elements which execute synchronously translatory oscillations in both directions parallel to the plane of the table. In addition, each table element is driven to oscillate vertically, and the vertical oscillations are synchronized with the horizontal oscillations.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved apparatus of the above-outlined type which makes possible a simple adaptation to the conveying speed of the articles with a simple construction.
This object and others to become apparent as the specification progresses, are accomplished by the invention, according to which, briefly stated, the apparatus for advancing articles in a selected, approximately horizontal conveying direction, includes a plurality of side-by-side disposed table elements each having an upper, approximately horizontal article-supporting surface. The article-supporting surfaces together form an approximately horizontal conveying table. A first drive oscillates each table element parallel to its article-supporting surface in a motion having two motion components oriented in perpendicular, horizontal directions, and a second drive vertically oscillates each table element. A first synchronizing arrangement synchronizes the horizontal oscillations in the direction of the two motion components and a second synchronizing arrangement synchronizes the vertical oscillations with the horizontal oscillations. A first adjusting arrangement adjusts the phase of the vertical oscillations with respect to the horizontal oscillations and a second adjusting arrangement individually adjusts an amplitude of the vertical oscillation of each table element.
By providing that the phase of the vertical oscillation of each table element may be adjusted relative to the horizontal oscillations, the articles situated on each table element may be conveyed into an arbitrarily selected direction. By virtue of the individual adjustability of the amplitudes of the vertical oscillation, the conveying speed within the table may also be changed in a simple manner. By oscillating all the table elements in a horizontal plane by a common drive according to a further preferred embodiment, the transporting speed of all the table elements may be simultaneously altered in a simple manner over the entire table by changing the horizontal oscillating frequency or amplitude while maintaining the vertical oscillation amplitude the same.
REFERENCES:
patent: 3174613 (1965-03-01), Insolio
patent: 3613860 (1971-10-01), Waite
patent: 4546870 (1985-10-01), Cogo
patent: 5145049 (1992-09-01), McClurkin
patent: 0 563 824 (1993-10-01), None
patent: 2 259 900 (1993-03-01), None
Frei Peter
Ruf Lorenz Stefan
Wiesendanger Markus
Bidwell James R.
Kelemen Gabor J.
SIG Pack Systems AG
Venable
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