US3233658A - Projection screen adapted to be rolled up - Google Patents

Projection screen adapted to be rolled up Download PDF

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Publication number
US3233658A
US3233658A US210620A US21062062A US3233658A US 3233658 A US3233658 A US 3233658A US 210620 A US210620 A US 210620A US 21062062 A US21062062 A US 21062062A US 3233658 A US3233658 A US 3233658A
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United States
Prior art keywords
screen
pair
sleeves
tensioning
edges
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Expired - Lifetime
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US210620A
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English (en)
Inventor
Riedel Herbert
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Individual
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Individual
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Definitions

  • This invention relates to a projection screen assembly adapted to be rolled up, and more particularly, to a screen assembly for the projection of transparencies and slides.
  • My invention has for its object the provision of means for tensioning the screen in two directions so that th s screen will be completely flat and free from folds; this is of the greatest importance for the satisfactory reproduction of pictures.
  • it is also desirable to make handling as simple as possible, i.e. foolproof, and to ensure that the screen will take up as l ttle space as possible when rolled up ready for transportation.
  • two tubular rollers are used for tensioning the screen, the interior of these tubes also being available for accommodating elongated bracmg members or rods that extend vertically outside the two vertical sheet edges when the screen is erected, the result thereof being a particularly compact arrangement when the screen is rolled up.
  • each loop is secured near one of its ends to a roller, the other endof each loop being mounted on a tensioning sleeve which can be displaced relatively to the end of the roller by means of a screw-thread mechanism.
  • FIG. 1 is an overall elevational view of a pro ectionscreen assembly according to my invention
  • FIG. 3 is an axial section through the left-hand end of the upper roller
  • FIG. 4 is a view, partly in axial section and partly in elevation, of the top end of a tensioning tube with a tensioning lock;
  • FIG. 5 is a view, partly in section and partly in elevation, of the bottom end of a tensioning tube
  • FIG. 6 is a view of a spring clip, in side elevation
  • FIG. 9 is a cross-section through the retaining bar, with clips hooked on to the bar.
  • the projection screen assembly comprises a special fabric sheet 1 which is provided at the top and at the bottom with loops 2 and 2 indicated by the loop stitching 3 and 4 in FIG. 1.
  • the loops 2, 2' of the fabric screen 1 are slid over tubular roller 5 and 6, respectively.
  • Each of the two rollers 5 and 6 consists of a special thin-walled tube.
  • a reduced end 8 (FIG. 3) of a respective tubular plug 7 is slid into the left-hand end of each roller (as illustrated for the upper tube 5 in FIG. 3) until a shoulder 9 of the plug abuts the end face of the tube.
  • a plurality of channels are provided on the reduced end 8, and an adhesive is painted onto it and enters these channels; this adhesive secures the tubular plug inside the roller tube.
  • a shallow annular groove 10 on the tubular plug 7 communicates with bores 11 spaced 90 apart.
  • the corresponding loop 2 or 2 is slid over the plug until it covers the annular groove 10; prior to this, an adhesive is introduced into the annular groove, and the screen after having been sl1pped over the groove is additionally secured to the tubular plug by means of tubular rivets 12.
  • a sleeve portion 14 of a spring clip 15 is fitted over the thickened extremity 13 of the tubular plug 7 and connected thereto by means of a rivet, as described above, which is received 1n a mounting hole 16 (FIG. 6) in the sleeve portion 14.
  • the tubular plug 7 is provided at its outer end with an external thread 26 (FIG. 3) on which a threaded portion 27 of a hollow screw cap 28 can be screwed.
  • the knob 39 is rotated in a counterclockwise direction, whereby the threaded tensioning tube 36 is screwed a greater or lesser distance out of the internal thread of the tubular plug 29 so that the knob 39 is displaced in the direction of the arrow B and also moves the tensioning sleeve 32 outwards through the intermed y of he rou d W re 42.
  • ten- Sioning tubes 48 are provided, each of which has at its bottom end a tensioning pin 49 (FIG, with a guide portion 50 which is slid into the tensioning tube until an annular collar 51 on the guide portion abuts against the end face of the tube; the portion 50 is then secured by two or more indentations 52 engaging in an annular groove 53 of that portion.
  • a respective threaded lock tube 54 is slid onto the top end of each tensioning tube 48 and secured by a transverse pin 55.
  • the upper part 56 of the lock tube 54 is provided with a thread which is screwed into an internal thread 57 of a lock sleeve 58 having a reduced pin 59 at the top.
  • the pins 49 and 59 of the tubes 48 are inserted into tensioning holes 60, 44 in the spring clips and 43 aligned with holes 60', 44 in sleeves 7 and 32, respectively (see also FIG. 1).
  • the lock sleeve 58 is rotated so as to be displaced upwards relatively to the tensioning tube 48, in the direction of the arrow C (FIG. 4).
  • the lower portion of the lock sleeve 58 and the lower portion of the tube 54 are made without threads and slidingly fit one inside the other, so that the sleeve 58 is suitably guided without tilting.
  • This projection screen may be suspended by means of the suspension cord 20,. But if the screen is to be attached to a stand, a retaining bar 61 (FIGS. 8 and 9) is also used, which has a length corresponding to the width of the screen and is provided with flat bent-away edge portions 62, 62' at its top and bottom. At the level of the lower edge portion 62, recesses 63 and 64 are provided near the two ends of bar 61 to enable the hooks 22 on the spring clips 15 and 43 to be hooked on after the studs thereof have been withdrawn, as shown in FIG. 9.
  • FIGS. 2 and 3 I have illustrated in dot-dash lines how the bracing members 48 can be received in the tubes 5, 6 when not in use, cap 28 being unscrewed from plug 7 for their insertion.
  • a collapsible projection-screen assembly comprising a generally rectangular projection screen of flexible sheet material having a pair of horizontal longitudinal edges and a pair of vertical transverse edges; a tubular first horizontal support member extending along one of said lfillgi lldinal edges; an elongated second horizontal support member extending along the other of said longitudinal edges; a first pair of sleeves on opposite extremities of said first support member fixedly secured to said screen and projecting beyond said vertical edges thereof; a second pair of sleeves on opposite extremities of said second support member fixedly secured to said screen and projecting beyond said vertical edges in substantially vertical alignment with said first pair of sleeves; extensible bracing means secured to each of said sleeves for supporting said members at said extremities only, said bracing means being adjustable in height for tensioning said screen in vertical direction by displacing said first pair of sleeves away from said second pair of sleeves; and control means traversing said tubular member in engagement with said first pair of sleeves for varying the relative spacing thereof, thereby tension ing said screen along said one of said longitudinal edges in horizontal direction.
  • control means includes screw means threadedly engaging one of the sleeves of said first pair and rotatable relatively to said tubular member.
  • said extensible bracing means includes at least two rods detachably connectable with the corresponding sleeves of said pairs.
  • each of said rods comprises a pair of threadedly interconnected members for adjustable extension of said rods.
  • a collapsible projection-screen assembly comprising a generally rectangular projection screen of flexible sheet material having a pair of horizontal longitudinal edges and a pair of vertical transverse edges; a tubular first horizontal support member extending along one of said longitudinal edges; a tubular second horizontal support member extending along the other of said longitudinal edges; a first pair of sleeves on opposite extremities of said first support member fixedly secured to said screen and projecting beyond said vertical edges thereof; a second pair of sleeves on opposite extremities of said second support member fixedly secured to said screen and projecting beyond said vertical edges in substantially vertical alignment with said first pair of sleeves; extensible bracing means secured to each of said sleeves for supporting said members at said extremities only, said bracing means being adjustable in height for tensioning said screen in vertical direction by displacing said first pair of sleeves away from said second pair of sleeves; and control means traversing each of said tubular support members in engagement with the respective pair of sleeves thereof for varying their relative spacing, thereby tensioning said screen along said longitudinal edges in horizontal direction.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
US210620A 1961-07-21 1962-07-16 Projection screen adapted to be rolled up Expired - Lifetime US3233658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER30809A DE1206619B (de) 1961-07-21 1961-07-21 Aufrollbare Bildwerferwand mit Spanneinrichtung

Publications (1)

Publication Number Publication Date
US3233658A true US3233658A (en) 1966-02-08

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Family Applications (2)

Application Number Title Priority Date Filing Date
US210620A Expired - Lifetime US3233658A (en) 1961-07-21 1962-07-16 Projection screen adapted to be rolled up
US508488A Expired - Lifetime US3314468A (en) 1961-07-21 1965-11-18 Retractable projection-screen assembly

Family Applications After (1)

Application Number Title Priority Date Filing Date
US508488A Expired - Lifetime US3314468A (en) 1961-07-21 1965-11-18 Retractable projection-screen assembly

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US (2) US3233658A (de)
DE (1) DE1206619B (de)
GB (1) GB1002065A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942868A (en) * 1973-04-27 1976-03-09 Mechanische Weberie Gmbh. Cine projection screen
US6598651B2 (en) * 1999-07-01 2003-07-29 Bos Gmbh & Co. Kg. Cargo area divider and method of making same
US8559104B2 (en) * 2011-04-25 2013-10-15 Ideaworkx Llc Retractable projection screen
US20190025691A1 (en) * 2016-01-08 2019-01-24 Izumi-Cosmo Company, Limited Portable screen device
US10684542B2 (en) 2017-05-16 2020-06-16 Draper, Inc. Projection screen system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590506A (en) * 1968-12-16 1971-07-06 Rudolph S Jeski Emergency vehicle signs
US5050846A (en) * 1990-11-01 1991-09-24 Ship'n Out Company Adjustable length, non-mechanized pedestrian traffic barrier system
US7207370B2 (en) * 2004-03-25 2007-04-24 Rite-Hite Holding Corporation Retractable safety barrier
US7380375B2 (en) * 2004-12-14 2008-06-03 Rite-Hite Holding Corporation Alarm system for a loading dock
US8590087B2 (en) 2004-12-14 2013-11-26 Rite-Hite Holding Corporation Lighting and signaling systems for loading docks
US8547234B2 (en) * 2004-12-14 2013-10-01 Rite-Hite Holding Corporation Alarm system for a loading dock
WO2009009435A2 (en) 2007-07-06 2009-01-15 Rite-Hite Holding Corporation Retractable safety barriers and methods of operating same
EP4018042A1 (de) 2019-08-21 2022-06-29 Rite-Hite Holding Corporation Stossfeste einziehbare sicherheitsbarrieren

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798181A (en) * 1905-02-27 1905-08-29 Arthur E Hobson Alloy.
US1042284A (en) * 1909-11-10 1912-10-22 Bertha Schenk Curtain-stretcher.
US1222805A (en) * 1915-03-11 1917-04-17 William Henry Schmid Combined screen and costumer.
US1546400A (en) * 1923-05-07 1925-07-21 John Nelson Bolting-cloth stretcher
US1776342A (en) * 1928-04-20 1930-09-23 Weinland George Fernando Projection screen
US1800627A (en) * 1927-12-17 1931-04-14 Da Lite Screen & Scenic Co Motion-picture screen and frame
US2197489A (en) * 1938-09-14 1940-04-16 Carl E Trulock Safety screen guard
US2403661A (en) * 1945-01-25 1946-07-09 Albert B Hurley Collapsible motion-picture-screen assembly
US2411131A (en) * 1945-07-11 1946-11-12 Berger G Hanson Windshield for motorcycles and the like
US2527816A (en) * 1946-08-31 1950-10-31 Alden R Herlache Combination portable projection screen and carrying case
US2922471A (en) * 1957-08-27 1960-01-26 Radiant Mfg Corp Projection screen
US2964106A (en) * 1957-08-27 1960-12-13 Radiant Mfg Corp Projection screen
US3048220A (en) * 1959-01-22 1962-08-07 Agfa Ag Suspension arrangement

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE627583C (de) * 1934-01-27 1936-03-18 Mechanische Weberei G M B H Lichtbildwandgestell
US2530877A (en) * 1947-10-25 1950-11-21 Da Lite Screen Company Inc Portable screen stand
US2720718A (en) * 1953-02-13 1955-10-18 Dan L Vaniman Map and blueprint holder
DE1710190U (de) * 1955-03-12 1955-11-03 Zeiss Ikon Ag Aufrollbarer projektionsschirm.
DE1707002U (de) * 1955-05-12 1955-09-15 Herbert Fink Projektionsschirm.
US3036628A (en) * 1956-08-17 1962-05-29 Radiant Mfg Corp Projection screen
US3166115A (en) * 1960-05-14 1965-01-19 Riedel Herbert Collapsible stand for a flexible projection screen
US3179161A (en) * 1961-11-30 1965-04-20 Weather Seal Inc Roll screen and spring positioning means

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798181A (en) * 1905-02-27 1905-08-29 Arthur E Hobson Alloy.
US1042284A (en) * 1909-11-10 1912-10-22 Bertha Schenk Curtain-stretcher.
US1222805A (en) * 1915-03-11 1917-04-17 William Henry Schmid Combined screen and costumer.
US1546400A (en) * 1923-05-07 1925-07-21 John Nelson Bolting-cloth stretcher
US1800627A (en) * 1927-12-17 1931-04-14 Da Lite Screen & Scenic Co Motion-picture screen and frame
US1776342A (en) * 1928-04-20 1930-09-23 Weinland George Fernando Projection screen
US2197489A (en) * 1938-09-14 1940-04-16 Carl E Trulock Safety screen guard
US2403661A (en) * 1945-01-25 1946-07-09 Albert B Hurley Collapsible motion-picture-screen assembly
US2411131A (en) * 1945-07-11 1946-11-12 Berger G Hanson Windshield for motorcycles and the like
US2527816A (en) * 1946-08-31 1950-10-31 Alden R Herlache Combination portable projection screen and carrying case
US2922471A (en) * 1957-08-27 1960-01-26 Radiant Mfg Corp Projection screen
US2964106A (en) * 1957-08-27 1960-12-13 Radiant Mfg Corp Projection screen
US3048220A (en) * 1959-01-22 1962-08-07 Agfa Ag Suspension arrangement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942868A (en) * 1973-04-27 1976-03-09 Mechanische Weberie Gmbh. Cine projection screen
US6598651B2 (en) * 1999-07-01 2003-07-29 Bos Gmbh & Co. Kg. Cargo area divider and method of making same
US8559104B2 (en) * 2011-04-25 2013-10-15 Ideaworkx Llc Retractable projection screen
US20190025691A1 (en) * 2016-01-08 2019-01-24 Izumi-Cosmo Company, Limited Portable screen device
US10684542B2 (en) 2017-05-16 2020-06-16 Draper, Inc. Projection screen system

Also Published As

Publication number Publication date
DE1206619B (de) 1965-12-09
US3314468A (en) 1967-04-18
GB1002065A (en) 1965-08-25

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