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1. (WO1991017864) WOODWORKING MACHINE, SUCH AS A TRAVERSING SANDING MACHINE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017864 International Application No.: PCT/DK1991/000137
Publication Date: 28.11.1991 International Filing Date: 21.05.1991
Chapter 2 Demand Filed: 06.12.1991
IPC:
B24B 7/28 (2006.01) ,B24B 21/04 (2006.01) ,B24B 41/06 (2012.01) ,B27C 1/14 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
24
GRINDING; POLISHING
B
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
7
Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
20
characterised by a special design with respect to properties of the material of non-metallic articles to be ground
28
for grinding wood
B PERFORMING OPERATIONS; TRANSPORTING
24
GRINDING; POLISHING
B
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
21
Machines or devices using grinding or polishing belts; Accessories therefor
04
for grinding plane surfaces
B PERFORMING OPERATIONS; TRANSPORTING
24
GRINDING; POLISHING
B
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
41
Component parts of grinding machines or devices, such as frames, beds, carriages or headstocks
06
Work supports, e.g. adjustable steadies
B PERFORMING OPERATIONS; TRANSPORTING
27
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
C
PLANING, DRILLING, MILLING, TURNING, OR UNIVERSAL MACHINES
1
Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
14
Other details or accessories
Applicants:
HH PATENT A/S [DK/DK]; Grødevej 14 DK-6823 Ansager, DK
Inventors:
HUNDEBØL, Keld, Otting; DK
Agent:
LARSEN & BIRKEHOLM A/S; SKANDINAVISK PATENT BUREAU P.O. Box 200 Skagensgade 64 DK-2630 Taastrup, DK
Priority Data:
1269/9022.05.1990DK
Title (EN) WOODWORKING MACHINE, SUCH AS A TRAVERSING SANDING MACHINE
(FR) MACHINE A BOIS DU TYPE PONCEUSE TRANSVERSALE
Abstract:
(EN) On woodworking machines of the traversing type, for example those used for sanding operations, the items (23) are secured on a vacuum conveyor (3). When the items are not perfectly plane, or when the contact surface against the conveyor is small, the holding power is often not suffcient to allow satisfactory processing operations to be effected without the time-consuming use of devices such as clamping tools or the like. In order to overcome this disadvantage, the machine according to the invention is provided with a number of compressed air nozzles (10) which direct a stream of air towards the items (23), whereby there is achieved a hitherto unknown degree of good retention, even of items which have not hitherto been able to be secured by means of air alone. The nozzles (10) are connected to the presurre side (9) of the air pump (6), and the suction of the conveyor (3) is connected to the pumps' inlet sides (8), thus hereby creating a closed system with good economy. Finally, there is a reduction in the friction of the belt (13) as well as the wear on the supporting plate (18), this being the result of the formation of eddy currents in some grooves (20), which are formed in the plate (18) and through which the air is sucked.
(FR) Dans les machines à bois du type transversal, par exemple celles qui sont utilisées pour des opérations de ponçage, les articles (23) sont maintenus en place sur un convoyeur à vide (3). Quand ces articles ne sont pas parfaitement plats ou quand la surface de contact avec le convoyeur est réduite, l'efficacité de maintien est souvent insuffisante pour permettre un traitement satisfaisant sans qu'il soit nécessaire d'utiliser des dispositifs impliquant une perte de temps, comme des outils de fixation ou analogue. Afin de palier cet inconvénient, la machine objet de l'invention est pourvue d'un certain nombre de buses à air comprimé (10) qui dirigent un courant d'air vers les articles (23), ce qui produit une qualité de maintien encore jamais obtenue, même pour des articles qu'il n'avait pas été possible de maintenir au moyen de l'air seul. Les buses (10) sont reliées au côté de refoulement (9) des pompes à air (6) et la partie du convoyeur (3) fonctionnant par aspiration est reliée aux côtés d'admission (8) des pompes, créant ainsi un circuit fermé à fonctionnement efficace. On obtient finalement une diminution de la friction de la courroie (13) ainsi que de l'usure de la plaque de support (18), cela résultant de la formation de courants parasites dans des rainures (20) formées dans la plaque (18) et par lesquelles l'air est aspiré.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, PL, RO, SD, SE, SU
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
FI925301NO19924332CA2083050AU1991079886