Textiles: manufacturing – Warp preparing or handling – Machine replenishing
Reexamination Certificate
2000-03-08
2001-03-13
Falik, Andy (Department: 3741)
Textiles: manufacturing
Warp preparing or handling
Machine replenishing
C139S00100C
Reexamination Certificate
active
06199249
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a device for the transfer of harness elements from a conveying member in a drawing-in machine for warp yarns onto carrying members of a weaving machine, with an ejector for removing the harness elements from the conveying member.
EP 500 848 has already disclosed such a device, in which the carrying members, designed as carrying rails, have an oblique entry flank directed downwards. Ejectors push the harness elements from carrying pins of a conveying member up onto these entry flanks, so that the harness elements slide along these entry flanks onto the carrying rails. The carrying rails are retained or supported against gravity by holding bolts which are capable of being moved in and out and which are fastened to a transport system. In their moved-in position, these holding bolts position the carrying rails. The holding bolts are moved out in order to allow the harness elements to pass at the relevant point.
A disadvantage of the known device mentioned is to be seen in that, in order to allow the harness elements to pass, the guidance or support of the carrying rails is temporarily removed precisely when the harness element passes over from the carrying pins of the conveying member onto the carrying rail. This puts exact alignment of the carrying pins and carrying rails at risk. This adverse circumstance can, admittedly, be eased by arranging the said guide of the carrying rails as far as possible from the conveying member, but, even then, the exact alignment of the carrying pins and carrying rails is impaired.
SUMMARY OF THE INVENTION
The invention, provides a device in which the carrying members are aligned as exactly as possible at the moment when the harness elements are transferred onto them.
This is achieved in that the carrying members or carrying rails are guided by a guide roller which is arranged very near the end of the carrying member at the conveying member and which has guides for the carrying member which guide the latter in two orthogonal directions, that is to say laterally and in the direction of gravity, during the transfer of the harness elements. The guide roller has a recess which, starting from the circumference, extends towards the axis and serves, on the one hand, for providing space for the lock-transfer of the end eyes of the harness elements and, on the other hand, for providing an engagement surface for the forward movement of the harness elements on the carrying member by means of the guide roller. In this case, the guide roller, together with the recess, forms a transfer lock for the harness elements.
The advantages achieved by means of the invention are to be seen, in particular, in that the carrying member is guided in an exact and defined manner at the moment when the harness elements are transferred from the conveying member, guidance for the lock-transfer of the harness elements being partially cancelled only when the harness element has already been taken up by the carrying member. In this case, the carrying members are always guided laterally by the guide roller, whatever the position of the latter. Another advantage is to be seen in that the guide roller executes a simple rotational movement and, at the same time, propels the harness elements some distance forwards. The guide roller may be designed for any number of adjacent carrying members. While a single harness element is being propelled forwards by the guide roller, the latter additionally holds back harness elements which have already been transported, so that these cannot be pushed towards the conveying member again.
REFERENCES:
patent: 4215455 (1980-08-01), Patel
patent: 4760628 (1988-08-01), Kaufmann
patent: 4891871 (1990-01-01), Tachibana et al.
patent: 5394596 (1995-03-01), Lindenmuller et al.
patent: 5459913 (1995-10-01), Lechner et al.
patent: 5657794 (1997-08-01), Briner et al.
patent: 30 05 071 (1980-08-01), None
patent: 0 298 696 (1989-01-01), None
patent: 0 646 669 (1995-04-01), None
patent: 92/05303 (1992-04-01), None
Falik Andy
Kelemen Gabor J.
Stäubli AG Pfäffikon
Venable
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