The present invention relates to vertical blinds for use in window treatments.
Vertical blinds typically comprise a series of elongated panels suspended vertically from a support assembly. The support assembly generally includes a frame or track within which hangers are disposed. The panels are suspended by attaching panels to hangers. The hangers are typically operable to both rotate the panels about the long axes thereof and to translate the panels along the frame or track. When the panels are rotated to one extreme, the panels generally align with line of sight such that the blinds are open and allow light to pass through. When the panels are rotated to an opposite extreme, the panels generally extend normal to the line of sight and slightly overlap one another such that the blind is closed.
Such vertical blinds can be rather plain in appearance and have limited capability to provide soft effects in controlling visibility therethrough. The use of cloth drapery-like structures in association with blinds have provided improvements in appearance and softening of light control. However, the support of such drapery-like structures is sometimes problematic and operability of the window treatment provided is often cumbersome.
A vertical blind is provided and includes a fabric having a series of vertical panels. The vertical panels include a series of vertical pocket panels, each pocket panel including a pocket. A vane is disposed and contained within respective pockets and function to move the associated pocket panel between open and closed positions.
Other objects and advantages of the present invention will become apparent and obvious from a study of the following description and the accompanying drawings which are merely illustrative of such invention.
With further reference to the drawings, the present invention provides a vertical blind, indicated generally by the numeral 10. Vertical blind 10 comprises a fabric having a plurality of vertical panels. As used herein, the term “vertical blind” refers to a blind having a plurality of elongated panels that when the blind is hung, extend vertically adjacent an opening, such as a window, in a building. The term “vertical panel” as used herein refers to an elongated portion of a vertical blind that extends generally vertical in the blind when the blind is hung. The vertical panels include pocket panels 12 and panels 14. In a preferred embodiment the fabric is a single sheet of fabric with panels 12 and 14 formed in the single fabric sheet. The term “single fabric sheet” or “fabric sheet” means a fabric structure that comes out of a weaving or knitting machine as a single unit. In one embodiment the panels 14 that comprise a part of the vertical blind 10 are non-pocket panels or include a layer of fabric that does not include an opening for receiving a vane or other similar structure. In one embodiment, the fabric includes one panel 14 interposed between two pairs of pocket panels 12. In this embodiment, each pocket panel in a pair is connected to the other pocket panel in the pair by a hinge 16. See
Forming a part each pocket panel 12 is a vertical pocket. A plurality of vanes 18 is provided and the vanes are contained in pockets. Each vane 18 forms an elongated member that is relatively stiff and substantial as compared to the fabric. Vanes 18 may be comprised of wood, plastic, cardboard, heavy and stiff or starched fabrics, or any other material that forms a relatively stiff elongated member that is capable of moving the pocket panels 12. In cross section, vanes 18 may be flat, ovate, or curved.
Vertical blind 10 is adapted to be suspended from a support assembly 20. Support assembly is of conventional design, and the details thereof will not be addressed herein. Generally, support assembly 20 includes a frame 22 and a series of moveable hangers 24 as illustrated in
In one embodiment, the panels of vertical blind 10 may vary in light transmissibility. In one embodiment, panels 14 are designed to be relatively translucent. For example, panels 14 may be of a woven or knitted sheer construction. The other panels, or pocket panels 12, may be relatively opaque. The relative opacity may be provided by the manner of construction of the pocket panels 12 themselves, by the vane 18, or by a combination of the pocket panels and the vanes.
Vertical blind 10 may assume open, closed, and various intermediate positions. For example, when applied to a window in a building, vertical blind 10 may be open to permit some light transmission there through as illustrated in
Generally, in the open configuration or position, the pocket panels 12 are oriented approximately perpendicular to the window surface while panels 14 are oriented somewhat in a parallel fashion to the window. In a closed position, the pocket panels 12 are moved to generally align with and extend along the non-pocket panels 14. In the closed position, pocket panels 12 thus abut or partially overlap adjacent pocket panels across vertical blind 10 to close the blind.
In one embodiment, the panels 12, 14 may have a variety of decorative surface features that display differently depending on the position of vertical blind 10. For example, in an open configuration, panels 14 predominate the front view of vertical blind 10, and any pattern or color of panels 14 is generally fully displayed. In a closed or intermediate position, decorative surface features of the pocket panels 12 will be visible and will provide a different decorative display.
In one embodiment, the fabric comprising vertical blind 10 includes at least two pairs of pocket panels 12 with at least one panel 14 interposed between the two pairs of pocket panels as best illustrated in
In one embodiment the fabric of vertical blind 10 comprises alternate pocket panels 12 and panels 14 as illustrated in
Panels 14 are generally facing the window, with each panel 14 forming a bow. Some panels 14 are thus relatively far from the window while alternate panels are relatively near the window. Vertical blind 10 thus assumes the form of a series “S” shaped portions. Panels 14 may be, in one embodiment, relatively translucent such that substantial light transmission is enabled through vertical blind 10 when in the open configuration. In one embodiment, panel 14 comprises relatively sheer or light-weight construction to enable relative translucence. Additionally, pocket panels 12 may be relatively opaque. In one embodiment, pocket panels 12 comprise relatively dense or heavy-weight construction to enable relative opacity. In the closed configuration, pocket panels 12 are rotated by turning hangers 24 such that the pocket panels generally align with panels 14 with alternate pocket panels being sandwiched between panels 14 as shown in
The fabric of vertical blind 10 may be formed with a varying pattern of pocket panels 12 and panels 14. In one embodiment, a part of the fabric may comprise one or more U-type portions while another part of the fabric may include one or more S-type portions. Various combinations and placements of S-type and U-type portions may be formed in the fabric to provide various appearances. For example, vertical blind 10 may comprise a group of U-type portions forming side borders with a group of S-type portions forming a central section as shown in
Vertical blind 10 may, in one embodiment, comprise a series of separate segments of fabric. A separate segment may comprise two pocket panels 12 and one panel 14 to form a segment as illustrated in
Turning now to a more detailed consideration of the pockets formed by pocket panels 14 of the fabric, each pocket extends along a substantial portion of one of the pocket panels. A pocket is comprised of first and second layers 12A, 12B. Layers 12A, 12B are adjacently disposed, the longitudinal edges thereof being connected together to form the pocket. In one embodiment, a lower end 12C of the pocket is open to permit insertion of vane 18 as illustrated in
Considering now the ways of connecting vertical blind 10 to hangers 24 of support 20, in one embodiment layers 12A and 12B may be continuous over pocket panel 12 as illustrated in
An alternative way of connecting vertical blind 10 to hangers 24 includes use of an adapter of common design which may be adhered to the upper portion of one or more pocket panels 12. In one embodiment of the U-type configuration, the adapter clips over and is secured to top, or outer, pocket layers 12A of adjacent pocket panels. In one embodiment, the adapter is secured to pocket layers 12a, 12B by adhesion or welding such as by sonic welding. In one embodiment of the S-type configuration, the adapter clips over and is secured to pocket layers 12A, 12B of one of the pocket panels 12. The adapter includes an opening similar to opening 18A in vane 18 for receiving stub 24A of hanger 24. In each of the foregoing embodiments, vanes 18 are supported within the pockets. In one embodiment vanes 18 may be supported by the lower ends of the pockets being at least partially closed. In one embodiment, the adapter compresses the panel or panels over which it clips sufficiently to support the panels by friction. In one embodiment the adapter may include appurtenances to at least partially penetrate the panel or panels to engage and hold the panels such that the ends of the pockets may be open or closed.
Turning now to the manufacture of vertical blind 10, the blind may be formed by various methods forming single sheets of fabric having pockets. In one embodiment the fabric is formed by weaving where the pockets of are integrally formed using techniques known to those of ordinary skill in weaving. In another embodiment a warp-knitted fabric is formed having panels wherein the pockets are integrally knitted into pocket panels 12 of the fabric using techniques known to those of ordinary skill in warp knitting.
In one embodiment, vertical blind 10 may be manufactured in a width-for-length form by a weaving process, for example, on a Jaquard Loom. In this embodiment, the length (vertical dimension) of vertical blind 10 is limited by the width of the weaving machine employed. The panels are formed in any desired sequence to produce vertical blind 10 with S-type, U-type, or combination features. It is sufficient to describe the formation of one panel 14 followed by an adjacent pocket panel 12.
In one embodiment, where non-pocket panel 14 is a relatively translucent or light-weight panel and pocket panel 12 is a relatively opaque or heavy-weight. First weft yarn 44 may be substantially smaller and lighter than the second weft or pocket yarn 46. Warp yarns 42A, 42B are generally identical to each other and, of course, continuous across all panels. A typical yarn selection for one embodiment is presented in a Table I.
The length of the panels, and thus of vertical blind 10, is determined for the particular application. This length, however, may be limited by the width of the weaving machine when the fabric is woven in a length-for-width arrangement as is the usual case. Typical maximum length is about 118 inches (300 cm). The width of the panels may likewise be variable. However, an exemplary panel width is about 4 inches (10.2 cm). In the case of pocket panels 12, the inside width of the pocket is generally about 3.75 inches (9.5 cm) to accommodate vanes 18 having a width of about 3.5 inches (8.9 cm). Where hinges 16 are required, as between adjacent pocket panels 12 in one embodiment of the U-type configuration, the hinges are typically about 3/16 inches (0.5 cm) wide and formed similarly to non-pocket panels 14. It is appreciated that alternative lengths and widths may be employed for various applications.
Where the fabric is to be cut into separate segments, for example including two pocket panels 12 and one panel 14, a transition portion may be woven connecting the panels 12 and 14. This transition portion may include a narrow strip running longitudinally alongside the pocket where a heavier first warp yarn 44 may be used. This transition portion is generally about ⅛ inch (0.3 cm) wide and may serve as a cutting guide for cutting the segments from the fabric.
Vertical blind 10 may also be formed by a knitting process on a Double Needle Bar Raschel Machine with a Piezo-Jacquard System such as the Nippon Mayer RDPJ 6/2. The warp knit construction of the fabric for vertical blind 10 is illustrated in
Generally, to form panel 14, yarns 62A, 62B form closed tricot stitches that run up course from one course to the next connecting adjacent wales. It is appreciated that the double needle bar of the RDPJ 6/2 can produce a fabric sheet that encompasses two parallel planes, a back plane associated with the back needle bar and the front plane associated with the front needle bar. However, the needles may deflect to tie stitches between planes as illustrated in the left hand portion of side view 70 in
To form pocket panels 12, the yarns do not alternate between planes. Rather, yarns 64A form layer 12A in the back plane by closed tricot stitches connecting adjacent wales, and yarns 64B form layer 12B in the front plane similarly by making close tricot stitches connecting adjacent wales. For example, yarn 64A executes a closed tricot stitch at course C1—wale W8 in the back plane and, remaining in the back plane makes a tricot stitch at course C3—wale W7 to form layer 12A. Yarn 64B, for example, forms a closed tricot stitch at course C2—wale W9 in the front plane and, remaining in the front plane makes a tricot stitch to course C4—wale W8, and so forth. In this manner layers 12A and 12B of the pocket are formed as illustrated in side view 70.
Yarns of the first group 62A, 62B may be identical to yarns of the second group 64A, 64B. As has been noted, however, the two groups of yarns may differ. For example, when it is desired to provide a relatively sheer or light-weight panel 14 and a relatively heavy-weight pocket panel 12 yarns 64A, 64B may be heavier yarns than yarns 62A, 62B. A typical yarn selection for one embodiment of vertical blind 10 is given in Table II below.
As is the case with a woven vertical blind 10, the length of the panels is determined for the particular application. However, in the case of knitted vertical blind 10 the length has no practical limit. This is true because knitting of the sheet of fabric comprising vertical blind 10 is done in a length-for-length arrangement.
To provide structural substance to panel 14, for example when the panel is of a sheer or light-weight construction, the fabric may be heat set to at least partially fuse warp and weft yarns. This fusing by heat setting stabilizes the fabric sheet and adds to the ability of the fabric sheet to maintain shape. Maintaining shape assists in forming and holding a bow in sheer non-pocket panels 14 when vertical blind 10 is not closed.
Where required, and whether formed by weaving, knitting, or other fabrication method, ends of pockets are closed to form closure 12D. Further, depending on the method of manufacture, selvages may be formed and required to be cut off. Also, in forming segments which can be assembled into blinds as described here before, fabric or sheet material is required to be precisely cut. Generally, using heat provided in various forms provides the sealing and cutting functions required. For example a sonic cutter or laser cutter may be used to cut the fabric or sheet. Such cutters function by passing a cutter head along the fabric at a pre-determined speed. Energy from the cutter melts the fabric, generally severing the fabric. Where cutting is across pockets, the speed of the cutter can be adjusted such that layers 12A, 12B are cut without fusing together. However, in the case of sealing the end of a pocket, the speed of the cutter may be modified to melt and fuse end portions of layers 12A, 12B together such that the remaining selvage may be cleanly torn away leaving a closure 12D closing the end of the pocket.
The present invention may, of course, be carried out in other specific ways than those herein set forth without departing from the scope and the essential characteristics of the invention. The present embodiments are therefore to be construed in all aspects as illustrative and not restrictive and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.