Buckles – buttons – clasps – etc. – Hanger on portable article support for manual attachment...
Patent
1995-10-13
1997-06-10
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Hanger on portable article support for manual attachment...
24460, 24462, 160346, A47H 1300
Patent
active
056364172
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a curtain hook, comprising a plastic strip and an I-section which is integral therewith, said I-section having a first flange facing said strip, a second flange being a guide for a runner which grips around it and to which a hook-shaped element is connected, a body between said flanges and at least one sawtooth profile, the runner having at least one projection which engages in the sawtooth profile in order to prevent the runner from being moved in a certain direction, while movement of the runner in the opposite direction is still possible.
BACKGROUND OF THE INVENTION
Such a hook is shown in Dutch Patent Application 9201957 (not a prior publication) in the name of Eisenkolb Confectiemachines B.V. This patent application also describes a device by means of which a curtain hook can be moved automatically to a needle plate below a sewing machine, following which a stop element is operated to prevent the hook from sliding back. In this position of the curtain hook a curtain pleat can be brought in such a way that the strip and the I-section of the curtain hook fall into the pleat. A sewing machine clamp (pressure foot) is then operated in order to fix material and curtain hook, and the curtain hook can be sewn into the curtain pleat, the needle passing through the strip right next to the I-section. Said sewing machine clamp also presses on the runner. It has been found that this causes the hook to go into a slanting position, with the result that the stitching becomes curved and does not run in a straight line at right angles to the curtain edge. Besides, there is relatively little space present between the bottom side of the curtain hook and the needle plate of the sewing machine and between the top side of the curtain hook and the pressure foot of the sewing machine, which can give rise to problems when the curtain pleat is being slid over the curtain hook, in particular if the curtain is made of relatively thick, coarse material.
SUMMARY OF THE INVENTION
The object of the invention is to avoid these drawbacks, and to this end said second flange of the I-section is narrower than said first flange facing the strip.
Since the outer Flange of the I is narrower, the runner can also be made narrower, with the result that when the curtain hook is pressed on the needle plate of the sewing machine the hook does not go into a slanting position, or goes into a much less slanting position, and the stitching can be made in a straight line at right angles to the the curtain hook before the sewing machine clamp (pressure foot) moves down; there is more space between the bottom side of the hook and the needle plate. The other flange is preferably 2.6 mm wide and the flange facing the strip 5 mm wide.
The thickness of the runner (viewed in a direction parallel to the flanges of the I-section) is preferably around 5 mm, which is around 2.3 mm less than before.
The part of the strip facing the I-section preferably has a smooth surface, and the remaining part of the strip is rough. The needle will pass through the smooth part and have much less of a tendency to glance off an uneven part. The stitching becomes more uniform. The rough part is important for producing some friction.
If the smooth part is also made thinner, for example 0.3-0.5 mm instead of 0.5-0.7 mm, said part becomes more readily bendable, which is important when positioning a flat pleat or a pinch pleat; for the strip can be bent away relative to the I-section, with the result that the abovementioned special pleats can be flatter and look more attractive.
In order to simplify even further the slipping of a curtain pleat over a curtain hook, the end of the strip to which the runner can be moved is rounded both widthwise and as regards thickness.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be explained in greater detail with reference to the Figures.
FIG. 1 shows a section through the curtain hook according to the invention.
FIG. 2 shows a perspective view of the curtain hook.
DETAILED DESC
REFERENCES:
patent: 2633911 (1953-04-01), Rosenbaum
patent: 2772835 (1956-12-01), Prot
patent: 3178760 (1965-04-01), Kalal et al.
patent: 3444595 (1969-05-01), Wachenheimer
patent: 4231141 (1980-11-01), Derrick et al.
patent: 4454635 (1984-06-01), Russell
patent: 4682642 (1987-07-01), Hogshead, III et al.
Inprotec International B.V.
Sakran Victor N.
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