Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Reexamination Certificate
1999-09-30
2001-02-27
Purol, David M. (Department: 3634)
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
Reexamination Certificate
active
06192963
ABSTRACT:
BACKGROUND OF THE INVENTION
a) Technical Field of the Invention
The present invention relates to a slat-actuating and positioning device for venetian blinds, and in particular, to a slat-actuating device employing a plurality sets of restriction cords for the mounting of the blind slats so as to firmly actuate (releasing or closing) the slats of the venetian blinds.
b) Description of the Prior Art
A conventional venetian blinds structure has been disclosed in ROC Utility Model Patent No. 81204926. As shown in
FIGS. 6 and 7
, there is a restriction cord
22
located in between two lateral main cords
21
of a pulling cord
20
. The restriction cord
22
restricts the top and the bottom of the slat
30
. At the center of the blind slat
30
, a hole
31
is provided to allow the passage of a suspension cord
40
so as to actuate the upward and downward movement of the slat
30
. In this structure, the replacement of blind slat
30
is very difficult and inconvenient With respect to mounting procedures. An improvement of this structure is shown in FIG.
7
. In between two lateral main cords
21
of a pulling cord
20
, a respective restriction cord
22
is provided to restrict the top and the bottom of the blind slat
30
. In this structure, no hole is provided to the blind slat
30
. However, the slat
30
, at a position corresponding to one side of the main cord
21
, is provided with a recessed positioning notch
32
. At the lateral side of the slats, a plurality of holes are provided for the passage of a suspension cord
40
. Thus, when the blind slats
30
and the bottom base seat
50
are actuated, the blind slats
30
and the bottom base seat
50
are lifted by force of the suspension cord
40
. Thus, the blind slats
30
and the base seat
50
will be tilted and separated. As a result of the uneven force exerted in actuating the blind slats
30
, the suspension cord
40
may be damaged. In addition, the combination of the blind slats
30
by pulling is separated and not in order.
SUMMARY OF THE INVENTION
It is an object of the invention to mitigate the above disadvantage. The invention more particularly aims at providing slat actuating and positioning device for venetian blinds, wherein a suspension cord together with another cord pass through a lug located at the sides of the main cord, and wind across the blind slats and the base seat. Thus, this structure provides a smooth actuating and an orderly structure for storage action. In addition, in combination with a plurality sets of restriction cords, and a plurality of positioning slots on the blind slats, the entire structure is a stable and rigid combination.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment described hereinafter.
REFERENCES:
patent: 5060709 (1991-10-01), Simon
patent: 5573051 (1996-11-01), Judkins
patent: 5582226 (1996-12-01), Voss et al.
patent: 5664614 (1997-09-01), Debs
patent: 5769140 (1998-06-01), Tuzmen
patent: 5918657 (1999-07-01), Tuzmen
A & J
Purol David M.
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