Winding – tensioning – or guiding – Helical or random winding of material – Including wound package or empty spool handling
Reexamination Certificate
1999-07-26
2001-06-12
Mansen, Michael R. (Department: 3653)
Winding, tensioning, or guiding
Helical or random winding of material
Including wound package or empty spool handling
C057S281000, C198S487100
Reexamination Certificate
active
06244533
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the movement of spools in textile machines for preparation of yarns, and in particular to a device and a method for loading the spools onto an individual, mobile support plates, for transport and positioning of the spools during processing.
2. Discussion of Background
In the known art, substantial preference has been given to moving the spools and tubes in the operations of production, control and packaging of the yarn, starting from textile fiber roving, using support plates, to be placed on conveyor belts or similar movement units used by the machine, in order to convey the spools and tubes individually to and from the work stations, at which spinning and spooling in particular are carried out.
In general, the support plates are provided with a vertical central pin, which makes it possible to keep the spools in an erect position, not only during transport, but also during the steps of preparation and winding, virtually without touching the spools, and with handling only of the support plates, without the support plates needing to touch, and slide into contact with, the machine, and therefore become dirty or damaged.
A problem which is associated with the use of support plates according to the known art, arises during the step of winding the spools in the spooler. In fact, account must be taken of the fact that in spoolers of the most recent design, the winding speeds are very high. This therefore generates stresses, which tend to displace the spool, or even pull the spool off of the pin of the support plate, on which it is simply supported as it is wound.
In order to eliminate these disadvantages, more elaborate support plate structures have been proposed, in which the support plate is provided with resilient means for retention of the spool, as well as with conical raiser fins for centering of the latter, for example in patents DE-A-4,236,038, and U.S. Pat. No. 5,297,761 in the name of Schlafhorst, and in the Italian patent application MI96A125 and European patent application EP-A-844,206, in the name of the same applicant.
These technical solutions consist of fitting the tube of the spool on the support plate, centering the spool, and overcoming specific resistance by the resilient retention means. This problem is significant, particularly if account is taken of the fact that the rate of supply of the spools to the spooler is very fast, particularly during the steps of starting up, or a change of processing. The time allowed for loading a spool onto its support plate, and for starting the processing, is approximately one second or slightly more.
SUMMARY OF THE INVENTION
In order to make more apparent both the technical problems posed and solved by means of the present invention, and its characteristics and advantages relative to the known art, the present invention is described here, purely by way of non-limiting example, with reference to its application for loading spools in a spooler, using a support plate, as described in the aforementioned European patent application EP-A-844,206, in the name of the same applicant.
The present invention thus relates to a device and a method for loading a spool onto the individual support plate. The present invention provides a device for loading and centering spools on support plates. The support plates are provided with a rod and centering and restraining springs. The spools are to be sent for winding of yarn therearound to an automatic spooler. The device for loading and centering of the spools on the support plates includes: a device for presentation and centering of the spool on the top of the rod of the plate support; a device for fitting the spool, the spool fitting device including a slider element, which is provided with means for actuation of vertical travel with reciprocal motion, and is provided with a fitting end element, which can follow a useful path which corresponds to fitting of the tube of the spool, until it is supported against the conical base stop of the support plate.
The present invention also provides a method for loading and centering of spools on support plates, the support plates being provided with a rod and centering and restraining springs, and the spool to be sent for winding of yarn therearound to an automatic spooler. The method for loading and centering of spools on support plates includes the steps of: presenting and centering the spool on the top of the rod of the support plate; releasing the spool presented, until the spool is supported on the springs of the support plate; and fitting the spool with a useful path which extends until the spool is supported against a base stop of the support plate.
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patent: 3712449 (1973-01-01), Holovnia et al.
patent: 3951350 (1976-04-01), Uchida
patent: 4634066 (1987-01-01), Matsui et al.
patent: 5205397 (1993-04-01), Sanno
patent: 5588602 (1996-12-01), Uno et al.
patent: 5954293 (1999-09-01), Luigi et al.
patent: 34 28 066 (1985-02-01), None
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Badiali Roberto
Piva Luigi
Quaia Amedeo
Raffin Maurizio
Mansen Michael R.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Savio Macchine Tessili S.p.A.
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