US3601912A - Woven screen stretching frame - Google Patents

Woven screen stretching frame Download PDF

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US3601912A
US3601912A US770595A US3601912DA US3601912A US 3601912 A US3601912 A US 3601912A US 770595 A US770595 A US 770595A US 3601912D A US3601912D A US 3601912DA US 3601912 A US3601912 A US 3601912A
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frame
screen
frame member
members
corner connector
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Wendell P Dubbs
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat

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  • This invention relates to improvements in woven screen printing apparatus and more particularly it relates to a frame for applying the desired amount of tension to a woven screen after it is mounted on the frame.
  • Another object of the present invention is to provide a frame for mounting a sheet of mesh as woven material for use in a silk-screening" process that will enable an unlimited amount of stretch to be applied to the sheet in either dimen-- sion.
  • Another object is to provide a frame for silk-screening on which the exact amount of stretch can be measured, thereby enabling successive screens to be mounted thereon with ex-- actly the same amount of tension.
  • Still another object of my invention is to provide a frame for mounting and applying tension to a printing screen that is particularly well adapted for ease and economy of manufacture and can be supplied with various interchangeable parts to form frames of different sizes.
  • my frame is comprised of opposite pairs of rollerlike frame members journaied in connecting corner members so that the frame members can be turned by a spanner wrench or some such tool and then be locked in position.
  • Each frame member has an axially extending means for gripping an edge portion of the screen, and increased tension on the sheet serves to increase the gripping force so no slippage can occur. Since each frame member is cylindrical in shape, it is inherently strong, and the entire frame structure can be light and easily handled.
  • FIG. ii is a view in perspective of a frame embodying the principles of the present invention.
  • FIG. 2 is an enlarged fragmentary plan view in section taken along line 2-2 of FIG. 1 at one comer of the frame;
  • FIG. 3 is a further enlarged fragmentary view in section of one frame member of the frame device in FIG. 1;
  • FIG. 4 is a view similar to FIG. 3 of a modified form of frame member for my frame device.
  • FIG. 1 shows a frame on which is mounted a printing screen 112 for use in making so-called silk screen type reproductions.
  • the frame is comprised of a pair of side members 14 of equal length and end members 16 which may be shorter, all of which are similar in construction except for their length.
  • Each frame member is generally cylindrical in shape and may thus be made from a metal tubing such as aluminum.
  • a connector member 1% At each corner of frame is a connector member 1% to which one side member and end member are rotatably connected.
  • These connector members may be identical, each essentially comprising a right angle member with integral flange portions extending from a junction at to each other.
  • Fixed within each end of a frame member is a plug 20.
  • Each plug has a main body 22 which is press fitted into an end of the frame members.
  • An adjacent flange portion 24 has a diameter equal to that of the frame member and provides a bearing surface between it and the connector member.
  • a cylindrical boss portion 26 extends axially from the flange portion and fits; with a smooth running clearance within a cylindrical hole 28 in the connector member.
  • each tflange on the connector members is a tightening screw 30 that extends through the hole b with its body 32 being threaded into the plug 20.
  • the screw is provided with a head 34 having either a flat sided recess, as shown, or flat exterior sides to facilitate its turning by an appropriate wrench.
  • a washer 36 is provided between the screw head and the outer surface 38 of the connector flange to increase the bearing area. Tightening of the screw 30 by a wrench on its head end draws the inner flange surface ii of the connector against the flange portion 24 of the plug and thereby prevents any rotation of the frame member after it has been rotated to its desired position.
  • a suitable torque bar indicated by the numeral 42 in FIG. 1. may be attached substantially radially to the frame member as by inserting it in one of a plurality of spaced-apart radially extending holes 43 which are circumferentially spaced apart near one end of each frame member.
  • each frame member At the other end of each frame member! provide a series of circumferentially spaced-apart marks 4, and on the top edge of the adjacent connector flange or on the inner flange face 410 a single index mark an is provided which can be aligned with themarlts M as the frame member is rotated. This enables the exact position of each frame member to be ascertained and thereby enables the amount of frame member rotation to be measured with precision so that a predetermined amount of stretch can be applied to a particular screen.
  • a screen edge retaining means for each frame member essentially comprises an external groove 48 extending axially along its length and provided with an overhanging lip 50 along one side of the groove. In cross section the groove is slightly V-shaped with bottom surfaces 52 that slope inwardly and meet along a central low line. Within the groove 4b is an elongated retaining member M having approximately the same or a slightly narrower width as the groove and which is formed from some resiliently flexible.
  • the retaining member has a notch 56 that extends axially along its top surface so that it will bend along a longitudinal axis to con form in cross section to the shape of the groove when it is inserted therein.
  • the screen When the screen is attached to a frame member, its edge portion extends across and around the overhanging lip portion 50, as shown in FIG. 3, and the frame member is rotated counterclockwise.
  • the tension created on the screen causes the retaining member 52 to bind the edge portion of the screen more tightly in place against the overhanging lip.
  • force is exerted perpendicular to the edge of the retaining member M, which is restrained by an equal and opposite force from the edge of the groove 4%.
  • edge portions of the screen are secured and no slippage can occur as the frame members are rotated.
  • FIG. 3 one embodiment of a frame member is shown which may be machined from common tubular metal stock. Adjacent the groove 48, a flat surface 58 can be formed to which is connected an elongated rule member 60 by means of a series of flat headed screws 62. The rule member extends beyond the edge of the groove and forms the lip 50.
  • a modified frame member which is formed as an extrusion with an integral lip member 50a overhanging a groove48a.
  • a thickened portion 64 of the frame member extends longitudinally below the groove to strengthen the frame member at this point and this also provides a locking lug which cooperates with a slot 66 in the end plug 20 to help lock the plug in place and prevent any relative rotation with the frame member.
  • the frame may be used for mounting a printing screen made from any of a wide variety of materials. However, it is particularly valuable for use with materials such as nylon which must be stretched to a point necessary to minimize resiliency.
  • the wrench 42 may be applied in a hole 43 to rotate each member the exact amount required, the amount of stretch being measured by observing the number of calibration marks 44 passing the index line 46.
  • each corner connector When the desired degree of screen tension is reached the locking screws in each corner connector can be easily taken up to hold the frame members firmly in place. It can be readily seen that the operation of my frame is relatively simple, yet highly efficient. If frames of different sizes are needed the same corner connectors can be used with pairs of frame members of different lengths. Thus, with one set of corner connectors and a stock of frame members, a printer can mount and use a wide range of screen sizes.
  • LA frame for supporting a printing screen comprising: a pair of end frame members and a pair of side frame members; means in each said frame member for retaining an edge portion of said'printing screen; corner connector means rotatably supporting each of said frame members at their ends to form a closed rectangle; and means for shifting said corner connector means along the axis of rotation of each of the adjacent frame members and for locking said frame members against rotation after they have been rotated to a predetermined position.
  • each said frame member is generally tubular and the means'rotatably supporting each said frame member comprises a plug fixed within each end of each said frame member and journaled in said comer connector means.
  • each said plug is made from a solid plastic material and has an integral end portion journaled in a said comer connector.
  • each said comer connector is a structural member comprised of a pair of side members integrally connected at right angles to each other.
  • each said frame member for retaining an edge portion of said screen comprises an axially extending slqt, means forming an overhanging lip along one axial side of said slot, and a flexible retainer strip in said slot for binding the screen material against said overhanging lip when tension is applied to the screen as the frame member is rotated.
  • the frame as described in claim 1 including a series of axially aligned indicating marks circumferentially spaced apart at one end of each said frame member, and an index mark on a said comer connector adjacent to said indicating marks on a connected frame member.
  • a frame as described in claim 1 further including a series of radially extending holes circumferentially spaced apart at one end of each frame for reception of a turning tool.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)

Abstract

A frame for supporting and stretching a rectangular printing screen of woven material comprised of pairs of opposite frame members connected by and journaled within corner members at their ends. The frame members have means for gripping the screen material along each edge and are rotatable within the corner members to apply tension to the screen in either dimension to create the desired amount of stretch in it.

Description

United States Patent [72] lnventor Wendell P. Dubbs 470 Nevada Ave., Palo Alto, Calif. 94301 21 Appl. No. 770,595 [22] Filed Oct. 25, 1968 [45] Patented Aug.3l, 1971 [54] WOVEN SCREEN STRETCHING FRAME 8 Claims,4 Drawing Figs.
[52] us. C1 ,38/l02.91, 69/193,101/127.1,101/415.1 [51] Int. Cl D061: 3/08, C14b 1/26 [50] Field ofSearch 101/127.l, 128,128.1,415.1;69/19.1,19.3;.38/102.91, 102.4, l02.1,102,102.3, 102.2,102.5-102.9; 24/2439, 243.10, 243.1 1
[ 56 References Cited UNITED STATES PATENTS 484,137 10/1892 Cauffield 69/19.3 886,400 5/1908 Palmer 24/243 UX 988,331 4/1911 Greulich et a1. 69/19.3 1,711,670 5/1929 Brennan 101/128.1UX 2,164,414 7/1939 Long 24/243 UX Primary Examiner-Robert E. Pulfrey Assistant ExaminerC1ifford D. Crowder Attorney-Owen, Wickersham & Erickson ABSTRACT: A frame for supporting and stretching a rectangular printing screen of woven material comprised of pairs of opposite frame members connected by and journaled within corner members at their ends. The frame members have means for gripping the screen material along each edge and are rotatable within the corner members to apply tension to the screen in either dimension to create the desired amount of stretch in it.
PATENTEU M331 KQH FIG .4
INVENTOR, WENDELL P. DUBBS ATTORNEYS WOVEN SCREEN STRETCHING FRAME This invention relates to improvements in woven screen printing apparatus and more particularly it relates to a frame for applying the desired amount of tension to a woven screen after it is mounted on the frame.
In screen printing processes commonly known as silkscreening" a woven screen material is used and printing is accomplished by forcing ink through interstices of the screen provided by the weave or mesh of the screen. The image to be printed is permanently formed on the screen by blocking certain of the interstices using a photo etching process or the like. To achieve high quality results with good registration and resolution in silk-screening it is necessary for the screen to be maintained stable and under tension so that when the ink is being forced through it, the screen will not stretch. Hererofore, for high resolution and precise registration a stainless steel mesh was required because of its inherent resistance to stretching. However, such metal meshes were extremely expensive. Also, they lacked durability since the small wires forming the mesh were relatively fragile and tended to fracture, thereby requiring the replacement of the entire screen. Other screen materials such as nylon were found to provide a similar quality of results if the screen could be stretched to reduce the inherent resiliency of the material. Since nylon and other nonmetallic screen materials are much less expensive than stainless steel it became important in the printing industry to provide a mounting frame for a printing screen that can stretch a screen to any desired tension and retain it in that condition during its use. A general object of the present invention is to solve this problem.
Another object of the present invention is to provide a frame for mounting a sheet of mesh as woven material for use in a silk-screening" process that will enable an unlimited amount of stretch to be applied to the sheet in either dimen-- sion. Thus, despite the characteristics of the sheet material used, most of its resiliency can be removed by initial tension and the tension can be maintained over a long period of use.
Another object is to provide a frame for silk-screening on which the exact amount of stretch can be measured, thereby enabling successive screens to be mounted thereon with ex-- actly the same amount of tension.
Still another object of my invention is to provide a frame for mounting and applying tension to a printing screen that is particularly well adapted for ease and economy of manufacture and can be supplied with various interchangeable parts to form frames of different sizes.
In general my frame is comprised of opposite pairs of rollerlike frame members journaied in connecting corner members so that the frame members can be turned by a spanner wrench or some such tool and then be locked in position. Each frame member has an axially extending means for gripping an edge portion of the screen, and increased tension on the sheet serves to increase the gripping force so no slippage can occur. Since each frame member is cylindrical in shape, it is inherently strong, and the entire frame structure can be light and easily handled.
Other objects, advantages and features of the present invention will become apparent from the following description presented with the accompanying drawings, in which:
FIG. ii is a view in perspective of a frame embodying the principles of the present invention;
FIG. 2 is an enlarged fragmentary plan view in section taken along line 2-2 of FIG. 1 at one comer of the frame;
FIG. 3 is a further enlarged fragmentary view in section of one frame member of the frame device in FIG. 1; and
FIG. 4 is a view similar to FIG. 3 of a modified form of frame member for my frame device.
Referring to the drawing, FIG. 1 shows a frame on which is mounted a printing screen 112 for use in making so-called silk screen type reproductions. The frame is comprised of a pair of side members 14 of equal length and end members 16 which may be shorter, all of which are similar in construction except for their length. Each frame member is generally cylindrical in shape and may thus be made from a metal tubing such as aluminum. At each corner of frame is a connector member 1% to which one side member and end member are rotatably connected. These connector members may be identical, each essentially comprising a right angle member with integral flange portions extending from a junction at to each other. Fixed within each end of a frame member is a plug 20. Although various materials may be used for these plugs, I prefer to use a solid plastic having good bearing properties such as nylon. Each plug has a main body 22 which is press fitted into an end of the frame members. An adjacent flange portion 24 has a diameter equal to that of the frame member and provides a bearing surface between it and the connector member. A cylindrical boss portion 26 extends axially from the flange portion and fits; with a smooth running clearance within a cylindrical hole 28 in the connector member.
From the outside surface of each tflange on the connector members is a tightening screw 30 that extends through the hole b with its body 32 being threaded into the plug 20. The screw is provided with a head 34 having either a flat sided recess, as shown, or flat exterior sides to facilitate its turning by an appropriate wrench. A washer 36 is provided between the screw head and the outer surface 38 of the connector flange to increase the bearing area. Tightening of the screw 30 by a wrench on its head end draws the inner flange surface ii of the connector against the flange portion 24 of the plug and thereby prevents any rotation of the frame member after it has been rotated to its desired position. When the screws are loose the frame members are rotated manually by means of a suitable torque bar indicated by the numeral 42 in FIG. 1. The latter may be attached substantially radially to the frame member as by inserting it in one of a plurality of spaced-apart radially extending holes 43 which are circumferentially spaced apart near one end of each frame member.
At the other end of each frame member! provide a series of circumferentially spaced-apart marks 4, and on the top edge of the adjacent connector flange or on the inner flange face 410 a single index mark an is provided which can be aligned with themarlts M as the frame member is rotated. This enables the exact position of each frame member to be ascertained and thereby enables the amount of frame member rotation to be measured with precision so that a predetermined amount of stretch can be applied to a particular screen.
In order for the screen material 12 to be stretched properly it must be attached to the frame members 14 and 116 along its edge portions so that no slippage occurs even though the tension forces become substantial. A screen edge retaining means for each frame member essentially comprises an external groove 48 extending axially along its length and provided with an overhanging lip 50 along one side of the groove. In cross section the groove is slightly V-shaped with bottom surfaces 52 that slope inwardly and meet along a central low line. Within the groove 4b is an elongated retaining member M having approximately the same or a slightly narrower width as the groove and which is formed from some resiliently flexible.
material such as a suitable metal or plastic. Preferably, the retaining member has a notch 56 that extends axially along its top surface so that it will bend along a longitudinal axis to con form in cross section to the shape of the groove when it is inserted therein. When the screen is attached to a frame member, its edge portion extends across and around the overhanging lip portion 50, as shown in FIG. 3, and the frame member is rotated counterclockwise. The tension created on the screen causes the retaining member 52 to bind the edge portion of the screen more tightly in place against the overhanging lip. As tension increases in the mesh 12, force is exerted perpendicular to the edge of the retaining member M, which is restrained by an equal and opposite force from the edge of the groove 4%. These forces tend to further deform the member 54, forcing it against the V-shaped bottom of the groove, with the mesh 12 between, thereby automatically increasing the grip on the mesh as tension is increased. Thus, the
edge portions of the screen are secured and no slippage can occur as the frame members are rotated.
In FIG. 3 one embodiment of a frame member is shown which may be machined from common tubular metal stock. Adjacent the groove 48, a flat surface 58 can be formed to which is connected an elongated rule member 60 by means of a series of flat headed screws 62. The rule member extends beyond the edge of the groove and forms the lip 50.
In the embodiment of FIG. 4, a modified frame member is shown which is formed as an extrusion with an integral lip member 50a overhanging a groove48a. A thickened portion 64 of the frame member extends longitudinally below the groove to strengthen the frame member at this point and this also provides a locking lug which cooperates with a slot 66 in the end plug 20 to help lock the plug in place and prevent any relative rotation with the frame member.
In use, the frame may be used for mounting a printing screen made from any of a wide variety of materials. However, it is particularly valuable for use with materials such as nylon which must be stretched to a point necessary to minimize resiliency. Once the edge portions of the screen are attached to the four frame members, the wrench 42 may be applied in a hole 43 to rotate each member the exact amount required, the amount of stretch being measured by observing the number of calibration marks 44 passing the index line 46.
When the desired degree of screen tension is reached the locking screws in each corner connector can be easily taken up to hold the frame members firmly in place. It can be readily seen that the operation of my frame is relatively simple, yet highly efficient. If frames of different sizes are needed the same corner connectors can be used with pairs of frame members of different lengths. Thus, with one set of corner connectors and a stock of frame members, a printer can mount and use a wide range of screen sizes.
To those skilled in the art to which this invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the spirit and scope of the invention. The disclosures and the description herein are purely illustrative and are not intended to be in any senselimiting.
I claim:
LA frame for supporting a printing screen comprising: a pair of end frame members and a pair of side frame members; means in each said frame member for retaining an edge portion of said'printing screen; corner connector means rotatably supporting each of said frame members at their ends to form a closed rectangle; and means for shifting said corner connector means along the axis of rotation of each of the adjacent frame members and for locking said frame members against rotation after they have been rotated to a predetermined position. 2. The frame as described in claim 1 wherein each said frame member is generally tubular and the means'rotatably supporting each said frame member comprises a plug fixed within each end of each said frame member and journaled in said comer connector means.
3. The frame as described in claim 2 wherein said locking means comprises a machine screw extending through a portion of said comer connector means and axially into a said p 4 The frame as described in claim 2 wherein each said plug is made from a solid plastic material and has an integral end portion journaled in a said comer connector.
5. The frame as described in claim 1 wherein each said comer connector is a structural member comprised of a pair of side members integrally connected at right angles to each other.
6. The frame as described in claim 1 wherein said means in each said frame member for retaining an edge portion of said screen comprises an axially extending slqt, means forming an overhanging lip along one axial side of said slot, and a flexible retainer strip in said slot for binding the screen material against said overhanging lip when tension is applied to the screen as the frame member is rotated.
7. The frame as described in claim 1 including a series of axially aligned indicating marks circumferentially spaced apart at one end of each said frame member, and an index mark on a said comer connector adjacent to said indicating marks on a connected frame member.
8. A frame as described in claim 1 further including a series of radially extending holes circumferentially spaced apart at one end of each frame for reception of a turning tool.

Claims (8)

1. A frame for supporting a printing screen comprising: a pair of end frame members and a pair of side frame members; means in each said frame member for retaining an edge portion of said printing screen; corner connector means rotatably supporting each of said frame members at their ends to form a closed rectangle; and means for shifting said corner connector means along the axis of rotation of each of the adjacent frame members and for locking said frame members against rotation after they have been rotated to a predetermined position.
2. The frame as described in claim 1 wherein each said frame member is generally tubular and the means rotatably supporting each said frame member comprises a plug fixed within each end of each said frame member and journaled in said corner connector means.
3. The frame as described in claim 2 wherein said locking means comprises a machine screw extending through a portion of said corner connector means and axially into a said plug.
4. The frame as described in claim 2 wherein each said plug is made from a solid plastic material and has an integral end portion journaled in a said corner connector.
5. The frame as described in claim 1 wherein each said corner connector is a structural member comprised of a pair of side members integrally connected at right angles to each other.
6. The frame as described in claim 1 wherein said means in each said frame member for retaining an edge portion of said screen comprises an axially extending slot, means forming an overhanging lip along one axial side of said slot, and a flexible retainer strip in said slot for binding the screen material against said overhanging lip when tension is applied to the screen as the frame member is rotated.
7. The frame as described in claim 1 including a series of axially aligned indicating marks circumferentially spaced apart at one end of each said frame member, and an index mark on a said corner connector adjacent to said indicating marks on a connected frame member.
8. A frame as described in claim 1 further including a series of radially extending holes circumferentially spaced apart at one end of each frame for reception of a turning tool.
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US3863368A (en) * 1972-04-24 1975-02-04 Michael Vasilantone Expander, device for stretching a fabric sheet
US3908293A (en) * 1974-09-19 1975-09-30 Stretch Devices Inc Screen tensioning and printing frame
US3922804A (en) * 1974-10-10 1975-12-02 Mayflower Textiles Co Inc Rug hooking frame construction for supporting and stretching a hooked rug fabric
US3982345A (en) * 1972-12-22 1976-09-28 Coleman Kelly R Display device with flexible face
DE2622967A1 (en) * 1975-05-22 1976-12-09 Hamu Kaino J HOLDING AND CLAMPING DEVICE FOR RAIL-SHAPED MATERIAL
US4345390A (en) * 1980-11-13 1982-08-24 Stretch Devices, Inc. Screen tensioning and printing frame
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US4430814A (en) * 1981-10-30 1984-02-14 Stretch Devices, Inc. Fabric tensioning roller
DE3239319A1 (en) * 1982-10-23 1984-04-26 Elmar Dr. 8000 München Messerschmitt CLAMPING DEVICE, IN PARTICULAR. FOR SCREEN PRINTING FRAME
US4525909A (en) * 1982-09-30 1985-07-02 Stretch Devices, Inc. Roller for screen tensioning and printing frame
US4625440A (en) * 1985-07-29 1986-12-02 The Dow Chemical Company Tentering frame for sheet-like members
US4860467A (en) * 1988-05-24 1989-08-29 Larson James D Stretching frame with adhesive fastening of a fabric workpiece
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US5117751A (en) * 1988-07-28 1992-06-02 Thompson Carl D Clamping apparatus and method for positioning a printing screen over a screen table
US5136797A (en) * 1989-09-09 1992-08-11 Hildebrandt Greg A Frame having shiftable bars with flexible ends for securing fabric using adhesive
US5163367A (en) * 1989-09-06 1992-11-17 Stretch Devices, Inc. Method and apparatus for linear adjustment of printing frame
US5255600A (en) * 1992-01-30 1993-10-26 Hamu Kaino J Reinforced printing frame structure
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USD371656S (en) 1994-10-21 1996-07-09 Uncommon Conglomerates, Inc. Elongated insert strip for adhesively fastening fabric to a frame
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US5802971A (en) * 1992-09-14 1998-09-08 Kaino J. Hamu Screen printing frame assembly with screen anchors
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US5937751A (en) * 1996-05-24 1999-08-17 Newman, Jr.; Eugene F. Retensionable screen frame and stretchers
US5937753A (en) * 1998-02-17 1999-08-17 Stretch Devices, Inc. Method and apparatus for stretching a screen on a screen printing roller frame
US6070526A (en) * 1998-10-22 2000-06-06 Larson; James D. Tensioning system for screen printing and method of tensioning
US6293608B1 (en) 2000-04-24 2001-09-25 Penda Corporation Self-adjusting tonneau cover assembly
US6360659B1 (en) 1999-10-07 2002-03-26 Don Newman Corner member for a screen printing roller frame
US6427588B1 (en) 2000-09-05 2002-08-06 Christopher Kline Device and method for supporting and tensioning a silk screen
US6505552B1 (en) 1998-10-22 2003-01-14 James D. Larson Silk screen tensioning system
US20040079245A1 (en) * 2002-10-25 2004-04-29 Larson James D. Economical screen-stretching device
US20070039214A1 (en) * 2005-08-22 2007-02-22 Stephen Schmidt Rug hooking frame
USD581695S1 (en) 2007-06-08 2008-12-02 Steelcase Development Corporation Worksurface assembly
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US7752963B1 (en) * 2006-07-13 2010-07-13 Niswonger John O H Apparatus and method for screen tensioning
US20110155003A1 (en) * 2006-07-13 2011-06-30 Niswonger John O H Roller frame stretcher
US8522681B2 (en) 2006-07-13 2013-09-03 John O. H. Niswonger Locking strip panel for silkscreen frame
US8544384B1 (en) 2006-07-13 2013-10-01 John O. H. Niswonger Screen-printing panel
US20150361717A1 (en) * 2014-06-17 2015-12-17 Hunter Douglas Industries B.V. Blind assembly and method of attaching a shade material to a winding core of a blind
US10039374B2 (en) 2016-05-13 2018-08-07 Steelcase Inc. Multi-tiered workstation assembly
US10517392B2 (en) 2016-05-13 2019-12-31 Steelcase Inc. Multi-tiered workstation assembly
US10681980B2 (en) 2010-06-02 2020-06-16 Steelcase Inc. Frame type workstation configurations
US12376677B1 (en) 2012-10-10 2025-08-05 Steelcase Inc. Ergonomic seating system, tilt-lock control and remote powering method and apparatus

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US3863368A (en) * 1972-04-24 1975-02-04 Michael Vasilantone Expander, device for stretching a fabric sheet
US3982345A (en) * 1972-12-22 1976-09-28 Coleman Kelly R Display device with flexible face
US3908293A (en) * 1974-09-19 1975-09-30 Stretch Devices Inc Screen tensioning and printing frame
US3922804A (en) * 1974-10-10 1975-12-02 Mayflower Textiles Co Inc Rug hooking frame construction for supporting and stretching a hooked rug fabric
DE2622967A1 (en) * 1975-05-22 1976-12-09 Hamu Kaino J HOLDING AND CLAMPING DEVICE FOR RAIL-SHAPED MATERIAL
US4345390A (en) * 1980-11-13 1982-08-24 Stretch Devices, Inc. Screen tensioning and printing frame
FR2512427A1 (en) * 1981-09-08 1983-03-11 Hamu Kaino TENSIONER CHASSIS FOR SHEET OR BAND MATERIALS
DE3139533A1 (en) * 1981-09-08 1983-03-24 Kaino J. El Toro Calif. Hamu STRETCH FRAME
US4430814A (en) * 1981-10-30 1984-02-14 Stretch Devices, Inc. Fabric tensioning roller
US4525909A (en) * 1982-09-30 1985-07-02 Stretch Devices, Inc. Roller for screen tensioning and printing frame
DE3239319A1 (en) * 1982-10-23 1984-04-26 Elmar Dr. 8000 München Messerschmitt CLAMPING DEVICE, IN PARTICULAR. FOR SCREEN PRINTING FRAME
US4625440A (en) * 1985-07-29 1986-12-02 The Dow Chemical Company Tentering frame for sheet-like members
US4860467A (en) * 1988-05-24 1989-08-29 Larson James D Stretching frame with adhesive fastening of a fabric workpiece
US5018442A (en) * 1988-07-11 1991-05-28 Hamu Kaino J Printing screen stretch frame
US5117751A (en) * 1988-07-28 1992-06-02 Thompson Carl D Clamping apparatus and method for positioning a printing screen over a screen table
US5163367A (en) * 1989-09-06 1992-11-17 Stretch Devices, Inc. Method and apparatus for linear adjustment of printing frame
US5136797A (en) * 1989-09-09 1992-08-11 Hildebrandt Greg A Frame having shiftable bars with flexible ends for securing fabric using adhesive
WO1992007718A1 (en) * 1990-11-01 1992-05-14 Stretch Devices, Inc. Structures for screen tensioning and printing
US5127176A (en) * 1990-11-01 1992-07-07 Stretch Devices, Inc. Tensional frame with rollers and elongated end plug surfaces
US5255600A (en) * 1992-01-30 1993-10-26 Hamu Kaino J Reinforced printing frame structure
US5271171A (en) * 1992-02-10 1993-12-21 Smith David C Compressible and expandable stretching frame with adjustable corner brackets
US5802971A (en) * 1992-09-14 1998-09-08 Kaino J. Hamu Screen printing frame assembly with screen anchors
US5265534A (en) * 1993-03-23 1993-11-30 Hamu Kaino J Screen roller printing frame improvements
USD371656S (en) 1994-10-21 1996-07-09 Uncommon Conglomerates, Inc. Elongated insert strip for adhesively fastening fabric to a frame
US5488901A (en) * 1994-12-23 1996-02-06 Hruska; Jerome J. Device and method for stretching a screen on a roller frame
US5676052A (en) * 1995-09-27 1997-10-14 Wegrzyn; Peter F. Apparatus and method for tensioning a silk screen
US5913263A (en) * 1995-12-22 1999-06-22 Stretch Devices, Inc. Device and method for stretching a screen on a roller frame
US5937751A (en) * 1996-05-24 1999-08-17 Newman, Jr.; Eugene F. Retensionable screen frame and stretchers
US5937753A (en) * 1998-02-17 1999-08-17 Stretch Devices, Inc. Method and apparatus for stretching a screen on a screen printing roller frame
WO1999041017A1 (en) * 1998-02-17 1999-08-19 Stretch Devices, Inc. Method and apparatus for stretching a screen on a screen printing roller frame
US6070526A (en) * 1998-10-22 2000-06-06 Larson; James D. Tensioning system for screen printing and method of tensioning
US6505552B1 (en) 1998-10-22 2003-01-14 James D. Larson Silk screen tensioning system
US6360659B1 (en) 1999-10-07 2002-03-26 Don Newman Corner member for a screen printing roller frame
US6293608B1 (en) 2000-04-24 2001-09-25 Penda Corporation Self-adjusting tonneau cover assembly
US6427588B1 (en) 2000-09-05 2002-08-06 Christopher Kline Device and method for supporting and tensioning a silk screen
US20040079245A1 (en) * 2002-10-25 2004-04-29 Larson James D. Economical screen-stretching device
US6736057B1 (en) * 2002-10-25 2004-05-18 James D. Larson Economical screen-stretching device
US20070039214A1 (en) * 2005-08-22 2007-02-22 Stephen Schmidt Rug hooking frame
US7222445B2 (en) 2005-08-22 2007-05-29 Stephen Schmidt Rug hooking frame
US8522681B2 (en) 2006-07-13 2013-09-03 John O. H. Niswonger Locking strip panel for silkscreen frame
US7752963B1 (en) * 2006-07-13 2010-07-13 Niswonger John O H Apparatus and method for screen tensioning
US20110155003A1 (en) * 2006-07-13 2011-06-30 Niswonger John O H Roller frame stretcher
US8544384B1 (en) 2006-07-13 2013-10-01 John O. H. Niswonger Screen-printing panel
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USD584542S1 (en) 2007-06-07 2009-01-13 Steelcase Development Corporation Worksurface assembly
USD596874S1 (en) 2007-06-08 2009-07-28 Steelcase Inc. Worksurface assembly
USD581695S1 (en) 2007-06-08 2008-12-02 Steelcase Development Corporation Worksurface assembly
US11930926B2 (en) 2010-06-02 2024-03-19 Steelcase Inc. Frame type workstation configurations
US10681980B2 (en) 2010-06-02 2020-06-16 Steelcase Inc. Frame type workstation configurations
US11317716B2 (en) 2010-06-02 2022-05-03 Steelcase Inc. Frame type workstation configurations
US11882934B2 (en) 2010-06-02 2024-01-30 Steelcase Inc. Frame type workstation configurations
US11944194B2 (en) 2010-06-02 2024-04-02 Steelcase Inc. Frame type workstation configurations
US12376677B1 (en) 2012-10-10 2025-08-05 Steelcase Inc. Ergonomic seating system, tilt-lock control and remote powering method and apparatus
US12616301B1 (en) 2012-10-10 2026-05-05 Steelcase Inc. Ergonomic seating system, tilt-lock control and remote powering method and apparatus
US12672718B1 (en) 2012-10-10 2026-07-07 Steelcase Inc. Ergonomic seating system, tilt-lock control and remote powering method and apparatus
US9957751B2 (en) * 2014-06-17 2018-05-01 Hunter Douglas Industries B.V. Blind assembly and method of attaching a shade material to a winding core of a blind
US10815726B2 (en) 2014-06-17 2020-10-27 Hunter Douglas Industries B.V. Blind assembly and method of attaching a shade material to a winding core of a blind
US20150361717A1 (en) * 2014-06-17 2015-12-17 Hunter Douglas Industries B.V. Blind assembly and method of attaching a shade material to a winding core of a blind
US10039374B2 (en) 2016-05-13 2018-08-07 Steelcase Inc. Multi-tiered workstation assembly
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