| Title of Invention | "AN APPARATUS FOR DISTRIBUTING POWDERS ON A SUPPORT IN A PREDETERMINED PATTERN" |
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| Abstract | The apparatus for distributing powders on a support in a predetermined pattern, comprises: a belt conveyor (2) for transporting the support (3); a head for applying the powders (1), located above the conveyor (2), which head (1) comprises a ring-wound closed continuous belt (4) exhibiting a plurality of perforations arranged according to a predetermined pattern, the perforations being of a size which enables passage of predetermined quantities of poxvders; means for controlling a supply and delivery of powders through the perforations and for keeping the continuous belt (4) clean. The head also comprises means for controlling a movement of the continuous belt (4) in synchrony with a movement of the conveyor (2). |
| Full Text | We Claim: 1. An apparatus for distributing powders on a support in a predetermined pattern, comprising : a belt conveyor (2) for transporting the support (3); a head (1) for applying the powders, located above the conveyor (2), which head (1) comprises a ring-wound closed continuous belt (4) exhibiting a plurality of perforations arranged according to a predetermined pattern, which perforations áre of a size which enables passage of predetermined quantities of powders; means for controlling a supply and delivery of powders through the perforations and for keeping the continuous belt (4) clean; means for controlling a movement of the continuous belt (4) in synchrony with a movement of the conveyor (2), characterised in that said means for controlling a supply and delivery of powders through the perforations and for keeping the continuous belt (4) clean comprise: a hopper (5) located at a short dištance above the continuous belt (4); the hopper (5) exhibiting an outlet mouth which is transversally arranged with respect to the advancement direction of the continuous belt (4) and the conveyor (2), and which is delimited perpendicular to the advancement direction of the continuous belt (4) and the conveyor (2), by a front edge (50) and a back edge (51); a fixed upper doctor (6) which operates at the front edge (50) and which is pressed against an upper face of the continuous belt (4) by an elastic element (9); a fixed lower doctor (8) which pressed against a lower face of the continuous belt (4) and exerts thereon an antagonistic action to an action exerted by the fixed upper doctor (6); an adjustable doctor (7) which operates at the front edge (51) and is pressed against the upper face of the continuous belt (4) and is arranged opposite to and antagonistically to the fixed upper doctor (6); the adjustable doctor (7) being adjustable by sliding in a perpendicular direction to the back edge (51) and the front edge (50) in order to regualte an aperture of the outlet mouth of the hopper (5). 2. The apparatus as claimed in claim l, wherein the continuous belt (4) is not made of a textile materiál and does not present any unevenness in a thickness thereof. 3. The apparatus as claimed in any one of the preceding claim, where in the continuous belt (4) at sides thereof exhibits slots (40) for drawing, which slots (40) áre arranged in longitudinal rows paralled to a longitudinal axis of the continuous belt (4). 4. The apparatus as claimed in any one of the preceding claim, wherein the continuous belt (4) is partially wound on a plurality of rollers (10, 11, 12, 13) having parallel axes which áre arranged transversally to an advancement direction of the continuous belt (4) and the conveyor (2). 5. The apparatus as claimed in claim 4, wherein a roller (10) of the plurality of rollers (10, 11, 12, 13) is a drive roller and draws the continuous belt (4) in motion, and is equipped with radial projecting pins (14) which engage in the slots (40); the drive roller being located downstream, with reference to the advancement direction of the continuous belt (4) and the conveyor (2), of the means for controlling a supply and delivery of poxvders through the perforations and for keeping the continuous belt (4) clean. 6. The apparatus as claimed in claim 5, wherein at least the fixed upper doctor (7) and the fixed lower doctor (8) áre elastically deformable . 7. An apparatus for distributing powders on a support in a predetermined pattern, substantially as hereinbefore described with reference to the accompanying drawings. |
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895-delnp-2005-correspondence-others.pdf
895-delnp-2005-correspondence-po.pdf
895-delnp-2005-description (complete).pdf
| Patent Number | 227026 | ||||||||
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| Indian Patent Application Number | 895/DELNP/2005 | ||||||||
| PG Journal Number | 03/2009 | ||||||||
| Publication Date | 16-Jan-2009 | ||||||||
| Grant Date | 31-Dec-2008 | ||||||||
| Date of Filing | 09-Mar-2005 | ||||||||
| Name of Patentee | SYSTEM S.P.A. | ||||||||
| Applicant Address | NO. 73, VIA GHIAROLA VECCHIA, I-41042 FIORANO MODENESE, (MODENA), ITALY. | ||||||||
Inventors:
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| PCT International Classification Number | B28B 11/00 | ||||||||
| PCT International Application Number | PCT/IT02/000621 | ||||||||
| PCT International Filing date | 2002-09-30 | ||||||||
PCT Conventions:
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