Flexible or portable closure – partition – or panel – Plural run type
Patent
1994-10-24
1996-07-23
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Plural run type
160120, 160241, A47H 100
Patent
active
055380654
DESCRIPTION:
BRIEF SUMMARY
The invention pertains to a light-exclusion covering for window surfaces, to a method for its production and to a rolling up or unrolling device for its actuation.
Light-exclusion coverings for window surfaces are known that consist of two planar structures located one behind the other that are vertically adjustable by rolling or unrolling devices, and with zones of differing light transmissivity of flexible material, in particular of woven textiles or fabrics. Coverings of this type consist, as a rule, of foils with bar-like zones of differing light transmissivity running across the entire width, whereby in particular the zones of lesser light transmissivity extend regularly across the entire width of the planar structure, so that a total light covering can be attained by even a small vertical adjustment.
Such constructions are not entirely satisfactory in practice, since the attainable adjustments of the region are greatly limited.
It is the problem of the invention to remedy this disadvantage.
This is achieved by this invention for a light-exclusion covering of the above-mentioned type, in that the planar structures consist of a number of webs located side by side, which are connected to each other across a connecting piece, where the connecting pieces feature a nearly uniform light transmissivity across their entire length, whereby the length of the regions of greater light transmissivity is smaller than the length of the regions of lesser light transmissivity.
Thanks to this particular design it is possible to find an optimum solution through appropriate and/or task-specific selection and/or sizing of the regions of differing light transmissivity of the individual webs and of the connecting pieces.
Preferably, the covering is designed so that the regions with differing light transmissivity have the same size and regions of equal light transmissivity are located across the width of the planar structure.
The production of the covering is particularly simple when it is made of a woven textile fabric.
The preparation of the light-exclusion covering according to this invention takes place preferably on a knitting machine, where the width, height and light transmissivity of the differing web regions and the width and light transmissivity of the connecting pieces are preselectable or preadjustable on the machine for a planar structure to be produced.
To operate the light-exclusion covering according to this invention, a rolling or unrolling device is proposed that is distinguishing in that a separate rolling roller is provided for each upper end of the two planar structures, whereby these rollers are located side by side, and in that drive features are provided for the rollers.
The drive features are composed of at least one motor or, if desired, of at least one manual crank drive, where separate and independent drive features can be provided for each roller.
One particularly simple design can consist in that common drive units can be provided for both rollers; said drive units can be connected optionally with one and/or the other roller by means of transmission and/or coupling devices.
Thanks to the two separate rollers, less installed height is needed (sufficient width is provided), which can be decisive in practice. In addition, much greater variation of light exclusion can be achieved than with conventional systems with only a single roller (in particular with two independent planar structures).
The invention will be explained in somewhat more detail below based on embodiments presented in the figures. We have:
FIG. 1 shows a purely schematic view of a planar structure according to this invention;
FIGS. 2 and 3 show mounted light-exclusion coverings with suspended and/or free planar structures and their drive features (purely schematically);
FIGS. 4-7 show different variants of the drive features for the rolling and unrolling rollers, purely schematically; and
FIGS. 8 and 9 show an additional design of a rolling and unrolling device according to this invention.
FIG. 1 shows the fundamental structure of a
REFERENCES:
patent: 2140049 (1938-12-01), Grauel
patent: 2142822 (1939-01-01), Moore
patent: 2384377 (1945-09-01), Holstein
Brown Laurence R.
Johnson Blair M.
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