Ribbon-type device
AssigneeGustav Gerster GmbH & Co. KG
InventorMartin M. Gerster
Life of this patent
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Abstract
A ribbon-type device effects undulation of a curtain for gathering the same in the vertical or horizontal direction. A functional unit comprises two tapes of fabric, each of which extends in an undulating manner to form a plurality of alternating positively and negatively curved arcs. An arc of positive curvature of a first fabric tape is set so as to oppose an arc of negative curvature of a second fabric tape and an arc of negative curvature of the first fabric tape is set so as to oppose an arc of positive curvature of the second fabric tape. The two fabric tapes are joined to each other at each transition between an arc of positive curvature and an arc of negative curvature by means of tie-off stitching (tie-offs). A plurality of such tie-offs accommodate a pull cord of a curtain.
Claims5
A curtain comprising:
- a curtain material;
- a first pull cord;
- a second pull cord;
- a first ribbon device for effecting undulation of the curtain and accommodating the first pull cord;
- and
- a second ribbon device for effecting undulation of the curtain and accommodating the second pull cord,
- wherein each ribbon device comprises:
- a functional unit (160) comprising two fabric tapes (110, 120) wherein:
- two fabric tapes (110, 120) extend in an undulating manner to form a plurality of alternating positively and negatively curved arcs (111, 121, 112, 122);
- an arc of positive curvature (111) of a first fabric tape (110) is set so as to oppose an arc of negative curvature (122) of a second fabric tape (120) and an arc of negative curvature (112) of said first fabric tape (110) is set so as to oppose an arc of positive curvature (121) of said second fabric tape (120);
- the two fabric tapes (110, 120) are joined to each other at a transition between an arc of positive curvature (111, 121) and an arc of negative curvature (112, 122) by way of tie-off stitching (130) forming a plurality of tie-offs;
- and
- the plurality of tie-offs (130) accommodates an associated said first or second pull cord (140) of the curtain;
- and
- a tape of backing fabric (170) attached to the functional unit and to the curtain, the tape of backing fabric of the first ribbon device being separate from the tape of backing fabric of the second ribbon device.
Dependencies are inferred from the claim text.