US3623211A - Method of framing a foil portion - Google Patents

Method of framing a foil portion Download PDF

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Publication number
US3623211A
US3623211A US864048A US3623211DA US3623211A US 3623211 A US3623211 A US 3623211A US 864048 A US864048 A US 864048A US 3623211D A US3623211D A US 3623211DA US 3623211 A US3623211 A US 3623211A
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US
United States
Prior art keywords
foil
cutting
clamping
frame
tensioned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US864048A
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English (en)
Inventor
Gerhard Zuhlke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHWEIGER AND SCHWEIZER AG
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SCHWEIGER AND SCHWEIZER AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00596—Mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/042—Tension applied during working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49867—Assembling or joining with prestressing of part of skin on frame member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5136—Separate tool stations for selective or successive operation on work
    • Y10T29/5137—Separate tool stations for selective or successive operation on work including assembling or disassembling station
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53313—Means to interrelatedly feed plural work parts from plural sources without manual intervention
    • Y10T29/53383—Means to interrelatedly feed plural work parts from plural sources without manual intervention and means to fasten work parts together
    • Y10T29/53387—Means to interrelatedly feed plural work parts from plural sources without manual intervention and means to fasten work parts together by deforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53678—Compressing parts together face to face

Definitions

  • Another object of the yinvention is to provide a method and apparatus for framing a foil without folds or wrinkles.
  • Another object of the invention is to produce inexpensive framed mirrors without the use of glass.
  • a mirror-refiecting foil which is much larger than the area of the mirror to be produced, is tensioned in a plane, and perforated along an endless annular line, whereupon a marginal zone within the line of perforation is frictionally held between a pair of clamping parts.
  • the foil is then cut between the perforated holes, whereupon it is more firmly clamped by pressing the central foil part into engagement with a first frame part.
  • a second frame part is pressed against the first frame part, clamping the foil between the two frame parts, while the marginal zone is pulled out of the clamping means.
  • a method comprises the steps of tensioning a foil in a plane; making perforations in the foil along an endless line surrounding a foil part; frictionally holding an annular marginal zone of the foil part within the endless line; cutting the foil along the endless line; supporting first and second frame parts on opposite sides of the foil part inward of the frictionally ice held marginal Zone; moving the marginal zone beyond the first frame part so that a central foil portion of the foil part surrounded by the first frame part is tensioned; and moving the first frame part, and a second frame part matching the first frame part first into engagement with an annular framing Zone of the foil between the marginal zone and the central foil portion, and then into clamping engagement with the lfirst frame portion while pulling the marginal zone out of frictional engagement whereby the central foil portion is framed.
  • LIt is preferred to frictionally hold the marginal zone during the cutting of the foil, and to firmly clamp the marginal zone during the tensioning of the central foil portion.
  • An apparatus comprises tensioning means for tensioning a foil in a plane, and being preferably part of transporting means for stepwise transporting a foil web; cutting means having an annular edge formed with circumferentially spaced cutting points, and including cutting edge portions between the cutting points; annular clamping means for frictionally holding or clamping an annular marginal zone of the foil inward of the annular cutting edge; first and second support means for supporting the first and second frame parts on opposite sides of the tensioned foil inward of the annular clamping means; and operating means for operating the cutting means, the clamping means and the ⁇ support means in a timed sequence.
  • the operating means first move thev cutting means to a perforating position in which the points penetrate the foil, then move the clamping means to an operative position frictionally holding the annular marginal zone of the foil, then moves the cutting means to a cutting position in which the cutting edge portions cut out a foil part frictionally held by the clamping means, and then move the support means to a framing position in which the first and second frame parts clamp the cutout foil part while the marginal zone is pulled out of the clamping means.
  • the cutting means includes an annular wall having an annular cutting edge in which the cutting points alternate with recesed cutting edge portions so that, when the cutting means is moved toward the foil, first the cutting points penetrate the foil and make holes through the same along the endless line, whereupon further movement of the cutting means effects complete cutting of the foil along the endless line.
  • the clamping means include first and second clamping parts.
  • First spring means bias the yfirst clamping part and second spring means bias the second clamping part, the first spring means being weaker than the second spring means so that the first clamping part compresses the Ifirst spring means and engages the second clamping part for frictionally holding the marginal zone, whereupon movement of the first clamping part with the second clamping part compresses the second stronger spring so that the marginal zone is firmly clamped and the foil part is tensioned in the framing position.
  • the foil preferably consists of polyester, and has a thickness between 5 micron and 20 micron.
  • a mirror-refleeting layer of aluminum is vaporized onto one side of the foil.
  • the invention is not limited to the framing of mirror-refiecting foils, and foils framed in accordance with the invention may be used for other purposes.
  • FIG. l is a fragmentary schematic elevation, partially sectioned, illustrating an embodiment of the invention.
  • FIG. 2 is a fragmentary sectional view illustrating a detail of FIG. 1 on a larger scale
  • FIG. 3 is a fragmentary elevation illustrating a portion of a cutting means viewed in the direction of the arrow III in FIG. 2;
  • FIG. 4 is a fragmentary sectional view corresponding to FIG. 2, but illustrating another operational position
  • FIG. 5 is a fragmentary sectional view illustrating a modified embodiment of a frame provided with a foil in accordance with the invention.
  • a foil supply reel 2 is rotatably mounted on a supporting frame 1 and is driven from a motor 3 by a V-belt 4 in the direction of the arrow B.
  • a thin foil having a reecting mirror surface is Wound up on supply reel 2, and is guided over a tensioning roller 6, under a guidey roller ⁇ 8, and between a pair of transporting rollers 9* and 10, so that the section of the foil web 40 located between rollers 9, and 8, is lo'cated in a plane, and tensioned by tensioning roller 6 which is mounted on a lever arm 5 pivotally supported at its upper end on the supporting frame 1, and being biassed by a spring 7 to urge tensioning roller ⁇ 6 towards the right as viewed in FIG. l.
  • Transporting roller 10 abuts transporting roller 9 under pressure, and is turned by means of a lever 11 by a drive motor 12 in the direction 0f the arrow C so that upon each stroke of motor 12, foil web 40 is pulled off the supply reel 2.
  • the tensioned section of foil web 40 is located between a stationary support 19 carrying at its top end a iirst frame part 20, and a movable support 28 carrying at its lower end a second frame part 29 which has a flange with an inner cylindrical face 29a matching the outer cylindrical face 2011 of a flange of frame part 20, as best seen in FIG. 4.
  • a substantially circular foil part is framed between frame parts 2t) ⁇ and 29 in the tensioned condition obtained by tensioning roller 6. It will be noted that the tensioned section of the foil web 40 is substantially larger than the part thereof which can be framed by frame parts 20 and 29.
  • the drive motor 12 serves only the purpose of stepwise transporting foil web 40.
  • tensioning roller 6 is turned against the action of spring 7 to the position illustrated in broken lines in FIG. 1, in which a switch, not shown, is actuated by tensioning means 5, 6 to start motor 3 by which the foil web 40 ⁇ is unwound from supply reel 2 until tensioning roller 6 assumes a position on the r-ight illustrated in the full lines in FIG. l.
  • the tensioning means 5, 6 actuate another switch by which the circuit of motor 3 is interrupted.
  • Foil web 40 preferably consists of polyester, and has a thickness between 5 micron and 20 micron.
  • the mirror coating on one side of the foil is preferably vaporized aluminum.
  • ⁇ Supporting frame 1 has a base portion with a tubular wall having an inner cylindrical surface 13 provided with a circular groove 14 having rectangular cross-section.
  • ⁇ tubular clamping part 15 is located within the cylindrical surface 13, and has a Circular outer flange 16 projecting into the annular groove 14.
  • the annular cup face of groove 14 serves as a stop abutment for flange 16 which is urged by springs 17 resting on the lower annular face of groove 14 to move upward to the illustrated end position of the tubular clamping part 15 in which the circular clamping face 118 is located slightly below the tensioned foil section.
  • the annular clamping face 18 is located in a horizontal plane parallel to the plane of the tensioned foil section, and perpendicular to the vertical axis of the apparatus.
  • the base portion of supporting frame 2 carries a pair of upright guide posts 21 on which a yoke 22 is mounted for up-and-down movement.
  • Yoke22 is fixedly connected with support 28 which carries the upper frame part 29, and is reciprocated by a link 23 pivotally connected thereto and also to a rotary member 25 carrying a pivot 24 on which the upper end of link 23 is mounted.
  • Member 25 is driven by a pulley and drive belt 27 from a motor 26 so that during operation of the motor 26, yoke 22 is reciprocated in up-and-down strokes.
  • the vertical posts 211 also support cutting means for vertical movement.
  • the cutting means include an annular holder 30 guided by posts 2-1 and located between upper springs 36 abutting yoke 22, and lower spring 37 abutting the top face of the base portion of support frame 1.
  • a oircular knife or cutter 31 is secured to cutter holder 30, movable with the same.
  • Cutter holder 30 has an inner face l32 formed with an annular groove 33l having a rectangular cross-section.
  • a circular clamping part 34 has an outer flange 340 located in groove 33 and abutting the lower annular face of the same due to the action of coil springs 34 which abut the upper face of groove 33.
  • the circular clamping face of the upper clamping part 34 is located in a plane parallel to the plane of the tensioned foil, and opposite the clamping face 18 of clamping part 15.
  • the diameter of clamping part 34 is greater than the diameter ⁇ of support 28 and frame part 29, and smaller than the diameter of the circular cutting knife 31.
  • the upper and lower faces of grooves 33 limit the up-and-down movement of Iclamping part 34.
  • the resilient spring force of springs 17 is greater than the force of springs 35, and the spring force of springs 36 is greater than the spring force of springs 37.
  • FIGS. 2 to 4 Iillustrate the active parts of the apparatus on a larger scale.
  • a cutting means 31 has a circular wall 31a with a lower circular cutting edge 31h which is formed with circumferentially spaced cutting points 38 whose lateral cutting portions define the angle 2a.
  • cutting recesses 39 are provided bounded by cutting edge portions defining the angle 2,6, which is preferably equal to the angle 2a.
  • Intermediate cutting recesses 39 and cutting point 38 less-slanted cutting portions are located.
  • the cutting points 38 penetrate the tensioned foil section and form holes in the same along an endless circular line.
  • the cutting angle a is effective so that slits are formed in the foil without circumferentially stretching the foil.
  • the foil is cut at the ends of the downward cutting stroke of the cutting means 30, 31 by the cutting edge portions forming the recesses 39, the cutting angle /8 being preferably equal to the cutting angle a and effecting cutting through the last rear end portions of the foil between the perforations formed by the points 38.
  • the intermediate less-slanted cutting edge portion effects the cutting between the effective periods of points 38 and recesses 39, and it is sufficient to have a small cutting angle only at the beginning and at the end of the cutting stroke by which the tensioned foil section is first perforated and then cut along a circular line for cutting out a circular central foil part.
  • a circular cut can be neatly effected during movement of the cutting knife in a direction perpendicular to the plane of the foil.
  • the foil web 40 is held in a tensioned planar position between guide roller 8 and transporting rollers 9 and 10.
  • the foil section is tensioned by the action of spring 7 on lever 5 of tensioning roller 6 which is urged to the position shown in solid lines in FIG. 1.
  • the vertical axis of the machine is also the axis of supports 28, 19, frame parts 29 and 20, circular clamping parts 34 and 15, and of cutting knife 31.
  • frame part 20 is located under the tensioned foil portion, and frame part 29 is located above the same, spaced a greater distance and registering with the lower frame part 20.
  • the annular clamping face 180 is located outside of frame part 29 above the tensioned foil portion, registering with clamping face 18 of clamping part 15 which is located under the tensioned foil portion.
  • Springs 36 and 37 hold the cutting means in a position in which the cutting edge is located below the clamping face 180 and adjacent the top face of the tensioned foil section.
  • Operating motor 26 is started and drives operating member 22 with support 28 downward.
  • the motion is also transmitted by a spring 36 to holder 30 of the cutting means, and by a spring 35 to the upper clamping part 34, and since these parts move simultaneously, the points 38 of cutting edge 31 first reach the tensioned foil and penetrate the same to form holes along a circular line surrounding a circular foil part whose diameter is greater than the diameter of the frame parts 20 and 29.
  • clamping face 180 engages the tensioned foil portion of foil web 40 and presses the same against clamping face 18 of the lower clamping part 15.
  • the flanks of the cutting points have somewhat deeper penetrated through the tensioned foil portion, and form spaced slits in the same.
  • the clamped marginal portion moves downward ywith clamping means 34, 15 to a position located below the top face of frame part 20 so that an annular framing zone 41a surrounding the central mirror portion 41 is engaged by the peripheral part of frame 20 and tensions the central nip foil portion 41.
  • the outer part of the foil section of foil web 40 remains in initial position surrounding cutting knife 31.
  • frame part 29 engages the annular portion of the foil surrounding the frame part 20, and clamps the same by contact of inner surface 29a against outer surface 20a of frame part 20.
  • the central mirror foil part 41 is now framed by frame parts 20, 29 in a tensioned condition without any folds or wrinkles.
  • Two frame parts 29 and 20 may now be secured to each other in any desired manner.
  • the marginal zone of the cut-out foil part is pulled out from the clamping end faces and 18, and the outermost part thereof projecting from the gap between the faces 29a and 20a, may be cut off.
  • FIG. 5 illustrates a modified frame consisting of a frame part 20' and upper frame part 29'.
  • an annular groove 42 is formed in frame part 20 into which a rib 43 of frame part 29' projects.
  • the outer margin 41' of the central foil part 41 is laid about rib 43.
  • Reinforcing ribs 46 are provided in the interior yof frame part 20 so that its rigidity is increased.
  • Frame parts 29' and 20 have abutting faces 45, 44 which are preferably welded by ultrasonic vibrations so that the mirror foil is permanently held in the frame 29', 20'.
  • Method of framing a foil portion comprising the steps of tensioning a foil in a plane; making perforations in said foil along an endless line surroundng a foil part; frictionally holding an annular marginal zone of said foil part within said endless line; cutting said foil along said endless line; supporting first and second frame parts on opposite sides of said foil part inward of said frictionally held marginal zone; moving said marginal zone beyond said first frame part so that a central foil portion of said foil part surrounded by said first frame part is tensioned; and moving said first frame part and a second frame part matching said first frame part first into engagement with an annular framing zone of said foil between said marginal zone and said central foil portion, and then into clamping engagement with said first frame portion while pulling said marginal zone out of frictional engagement whereby said central foil portion is framed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Laminated Bodies (AREA)
US864048A 1968-10-21 1969-10-06 Method of framing a foil portion Expired - Lifetime US3623211A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1567468A CH497881A (de) 1968-10-21 1968-10-21 Verfahren zur serienmässigen Herstellung mittelgrosser, glasloser Spiegel und Vorrichtung zur Durchführung des Verfahrens

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US3623211A true US3623211A (en) 1971-11-30

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Family Applications (2)

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US864048A Expired - Lifetime US3623211A (en) 1968-10-21 1969-10-06 Method of framing a foil portion
US141168A Expired - Lifetime US3705454A (en) 1968-10-21 1971-05-07 Apparatus for framing a foil portion

Family Applications After (1)

Application Number Title Priority Date Filing Date
US141168A Expired - Lifetime US3705454A (en) 1968-10-21 1971-05-07 Apparatus for framing a foil portion

Country Status (7)

Country Link
US (2) US3623211A (enrdf_load_stackoverflow)
AT (1) AT312916B (enrdf_load_stackoverflow)
CH (1) CH497881A (enrdf_load_stackoverflow)
DE (1) DE1938827A1 (enrdf_load_stackoverflow)
FR (1) FR2021107A1 (enrdf_load_stackoverflow)
GB (1) GB1260325A (enrdf_load_stackoverflow)
SE (1) SE353261B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064609A (en) * 1975-10-20 1977-12-27 Radiometer A/S Membrane mounting device
FR2504050A1 (fr) * 1981-04-20 1982-10-22 Thoratec Lab Corp Appareil pour appliquer une membrane sur l'extremite d'une tige, outil portatif de pose de membranes et appareil pour emballer et etalonner un detecteur de paupiere
US4644629A (en) * 1984-06-29 1987-02-24 Moore Iii Edgar F Embroidery framing method
US4790786A (en) * 1987-05-18 1988-12-13 Zenith Elecronics Corporation Factory fixture frame for an in-process tension mask color cathode ray tube
US4824412A (en) * 1986-02-21 1989-04-25 Zenith Electronics Corporation Method for mounting a tension mask color cathode ray tube
US4912829A (en) * 1987-12-16 1990-04-03 Hickey Donna M Drapery tie
US5794328A (en) * 1996-10-18 1998-08-18 Simone; Albert A. Automated window screen assembly apparatus
US6470562B1 (en) 2000-10-31 2002-10-29 Albert A. Simone Automatic screening machine for continuously applying spline to a window screen frame

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561177A (en) * 1984-09-14 1985-12-31 Rancer Karl E Apparatus for framing fabric in embroidery hoops
US4805297A (en) * 1987-10-16 1989-02-21 Seneff Robert W Apparatus for applying frames to fabric
DE4139283A1 (de) * 1991-11-29 1993-06-03 Roeder & Spengler Stanz Stanzmesser und vorrichtung zum stanzen
DE4304951C2 (de) * 1993-02-18 1997-09-11 Wachsmuth & Co Werkzeugbau Werkzeug zum Stanzen von Einfach- und Mehrfachbehältern aus Kunststoffolie
US5432990A (en) * 1993-04-26 1995-07-18 Seneff; Robert W. Apparatus for applying frames to fabric
US6138592A (en) * 1999-01-04 2000-10-31 Seneff; Robert W. Apparatus for applying frames to fabric

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US173720A (en) * 1876-02-22 Improvement in apparatus for enlarging and reducing prints
US1863073A (en) * 1930-04-23 1932-06-14 Bell Telephone Labor Inc Method and means for tensioning and for mounting diaphragms
US3286338A (en) * 1964-02-04 1966-11-22 Nicholas J Bohr Method for tensioning sieves
GB1251373A (enrdf_load_stackoverflow) * 1968-01-31 1971-10-27

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064609A (en) * 1975-10-20 1977-12-27 Radiometer A/S Membrane mounting device
FR2504050A1 (fr) * 1981-04-20 1982-10-22 Thoratec Lab Corp Appareil pour appliquer une membrane sur l'extremite d'une tige, outil portatif de pose de membranes et appareil pour emballer et etalonner un detecteur de paupiere
US4644629A (en) * 1984-06-29 1987-02-24 Moore Iii Edgar F Embroidery framing method
US4824412A (en) * 1986-02-21 1989-04-25 Zenith Electronics Corporation Method for mounting a tension mask color cathode ray tube
US4790786A (en) * 1987-05-18 1988-12-13 Zenith Elecronics Corporation Factory fixture frame for an in-process tension mask color cathode ray tube
US4912829A (en) * 1987-12-16 1990-04-03 Hickey Donna M Drapery tie
US5794328A (en) * 1996-10-18 1998-08-18 Simone; Albert A. Automated window screen assembly apparatus
US6470562B1 (en) 2000-10-31 2002-10-29 Albert A. Simone Automatic screening machine for continuously applying spline to a window screen frame

Also Published As

Publication number Publication date
GB1260325A (en) 1972-01-12
CH497881A (de) 1970-10-31
DE1938827A1 (de) 1970-04-30
US3705454A (en) 1972-12-12
SE353261B (enrdf_load_stackoverflow) 1973-01-29
FR2021107A1 (enrdf_load_stackoverflow) 1970-07-17
AT312916B (de) 1974-01-25

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