CA1043654A - Kit for attaching sheet material to a support - Google Patents
Kit for attaching sheet material to a supportInfo
- Publication number
- CA1043654A CA1043654A CA196,991A CA196991A CA1043654A CA 1043654 A CA1043654 A CA 1043654A CA 196991 A CA196991 A CA 196991A CA 1043654 A CA1043654 A CA 1043654A
- Authority
- CA
- Canada
- Prior art keywords
- bar
- channel
- side wall
- generally
- kit
- 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
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A two-piece kit is provided for attaching sheet material, such as polyethylene film, to greenhouses and the like. A rigid, elongated base member is adapted to become secured to a support and includes a channel longitudinally therealong for receiving a portion of the sheet material therein and which also receives a rigid element for holding the material, the element, having a configuration corresponding to that of the channel, the member and the element cooperating to releasably clamp the portion of the material in the channel. The channel combines a convex side wall and a planar side wall; the shape eliminates the usual requirement for spreading apart sides of the channel or contracting the inserted element. Thus, the two basic components of the assembly can be made of a rigid, shape-retaining material such as aluminum extrusion and as such are not subject to aging and undesired deformations on application of extreme stresses such as by winds or on disassembling the kit.
A two-piece kit is provided for attaching sheet material, such as polyethylene film, to greenhouses and the like. A rigid, elongated base member is adapted to become secured to a support and includes a channel longitudinally therealong for receiving a portion of the sheet material therein and which also receives a rigid element for holding the material, the element, having a configuration corresponding to that of the channel, the member and the element cooperating to releasably clamp the portion of the material in the channel. The channel combines a convex side wall and a planar side wall; the shape eliminates the usual requirement for spreading apart sides of the channel or contracting the inserted element. Thus, the two basic components of the assembly can be made of a rigid, shape-retaining material such as aluminum extrusion and as such are not subject to aging and undesired deformations on application of extreme stresses such as by winds or on disassembling the kit.
Description
1(3436S4 This invention relates to a kit for attaching sheet material to a support, an example of which is the cons-truction of a temporary of semi-permanent greenhouse s~ructure comprised of a framework over which sheet material, such as polyethylene film, is stretched to form an enclosure.
Fre~uently these structure~ are provided ~lth varlous temperature and other atmo~pherlc controlllng devlces whlch re~uire that the enclo~ure,be relatively tight to ~eal out the outslde weather yet must be Or a nature that permits at least partlal dlsas~embly durlng the Orr season whlle at the same tlme belng low cost both rrom the standpolnt Or ma-'terlal~ used and the labor involve~ ln assembly and dlsas~embly.
, Ih thls connectlon then, lt hae become a readlly ac-cepted practlce to employ the use o~ polyethylene rllm whlch horetorore has been attached to a rramework through the use Or lath~ or strlp~ Or wood whlch are nalled to the support ln such a,mannér that the rllm 18 dl~posed between tho lath and the ,eupport and thuo held ln place. Thls has been less than satl~-ractory, however, because Or the tendency ror;the plaetlc ma-ter~al to tear at the polnt that the nalls are drlven-through the lath an~ the ~ilm and because-,or the wlnd actlon whlch tends to caùse the rll~ to pull loose thus maklng the structure le~ than alr tlght ln addltlon damaging the polyethylene rllm.
~ It 1~ thererore a very lmportant obJect Or our lnven-tlon to provlde an assembly ror qulckly and eaolly a¢tachln~
oheet materlal ln the natuxe Or polyethylene rllm to a ~ra0e-~ork such a~ mlght be round ln the constructlon Or greenhouseo 'and the llke. - ' ' Another very lmportant obJect Or the lnventlon 18 to provlde an attachlng assembly ror sheet materlal ln whlch the msterlal 18 clamped by the assembly and held wlthout damage to ~the material such a8 by the puncturing of hole8 therein.
A ~t~ll ruither ~portant obJe-t Or our ln~entlo ~18 . _ . _ . . , . , _ _ . . .
: . .. .
1043~54 tho provlslon of a materla} holding assembly ln wh~ch the materlal ls po~ltlvely held-and ln whlch lncreased ten~lon on the.materlal wlll lncrease the grlp Or the as~embly on thc materlal thu~ clamplng lt tlghter.-. A stlll ~urther lmportant.obJect o~.the lnventlon 1~ the provl810n Or a ~aterlal holdlng assembly ln which ahoidlng element ls releasably held ln a channel withou~. the u~e o~ auxllllary ~asten~r~ yet wh1ch 18 capable o~ be~ng e~lly and qulckly removed rrom the channel.
Accord$ng to the present invention, a kit is provided for attaching sheet material to a support, said kit or the assembly being of the type including a first bar def ining a channel and a second bar complementary with said channel and adapted to be laterally inserted into the channel to thus grip a sheet material therebetween, Bai~ channel of ~aid fir~t bar being defined by a first l ~
~ide wall, a second side wall and a bottom wall extending .:
between interior margins of said side walls; said first ~ide wall being concavely curved to define an arcuate - 20 shape in lateral cross-section; said second side wall being generally planar and being of a width generally corresponding to the depth of said channel as measured at said second side wall; said side walls being so arranged ;
with respeot to each other that the width of said channel increase~ in a direction laterally away from said bottom wall, reaching its maximum at about mid-depth thereof and again decreasing in the direction to~aras exterior margi~s of said side walls; said second bar being of a lateral cross-:.
, "' "
ri ~ I "
*
. .
~043654 section generally complementary with the lateral cross-section of the channel of the first bar, said second bar including a first convexly curved side wall ana a second generally planar side ~all; said convexly curved side wall being ~e~erally comple~,entary with said concavely curved side wall, said second, generally planar side ~iall of the second bar being generally comple~entary with said side wall of the fir8~ bar~ where~y said second bar can be inserted into the channel of the first bar with a sheet disposed therebetween to grip the sheet between the respective side walls, the insertion being effected by moving said second bar generally laterally relative to the first bar such that the convex ~ide of the 8econd bar is first nested in the concave side wall and the second bar is then tilted to bring its generally planar side wall into a generally parallel relationship with the generally planar side wall of said channel, and whereby the ~eed for spreading apart the side walls of the first bar or contracting the side walls of the second bar when attaching a sheet is eliminated.
In the drawlngs: ~.
. ~ ~lgure 1. 18 a rragme,ntary pers~ectlve vlew or a greenhouse or the llke employlng the u~e Or a sheet materlal coverlng, such as polyethylene rllmJ whlch l~ attached to a ~ramework through the use Or an attachlng kit for sheet materlai made accordlnR to the present lnvent~on; - , - 2a -- - -11~4~
Flg. 2 1~ a rragmentary, enlarged, exploded, cross-sectlonal v~ew lllustratlng the relative dlspo~ltlons Or a i-base member and hold~ng element o~ the attaching assembly .wlth respect to the sheet materlal a~ they would appear lmmedl- ..
~até~y~pr`-ror to lnsertion o~ the materlal and the holdlng element lnto a channel Or the ba~e member;
Fig. 3 18 rragmentary, enlarged, cross-sectlonal vlew lllu~tratlng the holdlng element and the materlal partially ln-serted ln the channel Or the-base member; and ~lg. 4 i8 a rragmentary, enlarged, cross-sectlonal vlew ~lllustratlng the materlal holdlng as~embly as it would appear when ln clamplng engagement wlth the sheet materlal.
A kit, broadly desl~naeed bg the numeral 10, 18 provlded ror.the attachment or sheet materlal, 9uch as polyethylene rllm or the llke ldentirled by the numeral 12, ror use ln con--~ ~tructlng a greenhouse 14 or ror u~e ln other sltuatlono whero lt 1~ de~lred to.releasably hold a plece Or sheet materlalsuch a~ ror swlmmlng pool covers, 8110 covers, or ror cons~ructlon protection. --D~
I ' , , 10436S4 ~ -The kit 10 is comprised of an elongated base member 16 (also referred to as "a first bar"), adapted to be attached to a support, such as a sideboard 18, which in turn is affixed to a frame structure 20 of the greenhouse 14. The member 16 may be attached in any conventional manner such as through the use of flathead screws, (not shown) which cooperate with pre-punched holes (not shown) provided in the member 16.
The member 16 may be of any desired length depending on the particular application, with ten foot lengths normally being recommended, or may be cut into shorter lengths for following various contours such as for a gable end of the structure 20. Disposed longitudinally along the member 16 is a generally C-shaped channel 22 having an arcuate surfacé or first side wall 24 disposea tranQversely of the longitudinal axis of the member 16 and generally planar second siae wall 26 so that the width of the channel 22 first increases in the direction from the bottom wall to reach a maximum at about mid-aepth of the channel and then again decreases. The side wall extends perpendicularly to the bottom of the channel and thus - defines the depth of the channel.
The assembly 10 further includes an elongated material holding element 28 (also referred to as a ~second -~
bar") also being generally C-shaped in transverse cross-section corresponding to the configuration of the channel 22 and likewise including an arcuate surface or first side wall 30 disposed longitudinally therealong and transverse to the longitudinal axis of the element 28. It is to be here noted that the arc of curvature of the surface 24 of the channel 22 is somewhat larger than is the arc of curvature of the surface 30 of the element 18. An elongated arm 32 ~ 4 , 104;~6S4 defining a second, generally planar side wall of the second bar extends longitudinally along the entire length of the element 28 and defines the normally lower leg of the C-shaped element ~8. Elongated flange means 34 and 36, per-pendicular to the arms 32, extend longitudinally along the outer edge of the arm 32 and are disposed exteriorly of the channel 22 when the element 28 is nested therein.
As best seen in Figure 4, the lower flange 36 abuts against the outer edge of side wall 26 to thus limit the tilting movement of the two bars bringing their mutual arrangement from the state as in Figure 3 to that of Figure 4.
Means for retaining the element 28 in the channel 22 are provided in the form of an angular, normally down-wardly pro~ecting leg 38 which is a part of the member 16 and extenas longitudinally therealong ad~acent the normally upper edge of the channel 22, the transverse distance between the arm 32 and the leg 38 defining the-previously mentioned opening 26. The leg terminates in an arcuate, enlarged, material engageable lip 40 _ coextensive in length with the leg 38. A series of inter-~ locking, opposed and relatively offset gripping ribs ; 42 and 44 are provided on the arm 32 of the element 28 and on a normally lower arm 46 of the member 16 respectively.
~he ribs 42.and 44 extend longitudinally along their respective arms 32 and 46, the ribs 44 being disposed in the cavity 22 while the ribs 42 are on the normally lower or underside of the leg 32. A plastic or rubber beading, .
partially embedded in the arm 32, might be provided in lieu of the ribs 42; the beading being seated between the ribs 44 when the element 28 is inserted in to the channel 22. -: :
r. ~ ~
' ~`'; ~ S _ ~'., ' In addition to ~he~ eg 38 and the ribs 42 and 44, the element retaining means also includes an elongated, transversely arcuate stretch 48 extending longitudinally along the element 28 and defining the normally upper leg thereof. The stretch 48 is disposed behind the leg 38 when the element 28 is in the channel 22 such that the arcuate surfaces Z4 and 30 are in their opposed relationship.
The member 16 and the element 28 may be made of any convenient, durable, lightweight material such as extruded aluminum.
It will be appreciated on examination of Figure 4 that the clearance between respective side walls of the two bars generally corresponds to or is slightly less than t~Jice the thickness of sheet 12. When comparing Figur~ 3 and 4, and realizing that in both figures the sheet 12 is disposed between the two bars, it will be appreciated that the distance between the leading edge of the generally planar side wall of the second bar ~at the bottom left as viewed in Figure 3) and an imaginary line parallel with elongation of the second bar and most remote from the leading edge i~ less than the maximum width of the channel in the first bar. The said distance, of course, is in excess of the width of the second bar. The cross-sectional views of the drawing ~how a generally ideal dimensioning of the respective bars.
In u8e, the member 16 18 attached to the 81deboard 18 a8 prevlou81y de8crlbed and ln a po81tlon to permlt the materlal 12 to bo 8tretched oVer the 8tructure 20 as 8een ln Flg. 1. The ma-terial 12 18 then po81tloned relatlve to the member 16 ~uch that a portlon 50 o~ the materl~l 18 adJacent the openlng 26, lt belng noted that sur~lcient length 18 provlded to permlt the _ 6 -. ' ' ~ . : , ' ' ' 1043~54 materlal to extend beneath or beyond the assembly lO at all tlmes. The ele~ent 28 i~ then lnserted lnto the channel 22 such that the arcuate stretch 48 18 leadlng and enters the~
channel rlrst, rorcing the portlon 50 Or the materlal 12 through the openlng as ~een in Flg. 3. ~rter the,arcuate stretch 48 has been dl~posed behlnd the leg 38,.the arm 32 ls then pressed into the cavlty such that the portion 50 ls not only dl~posed between the member 16 and element 28 but l~ also ~clamped or grlpped between the cooperatlng rlbo 42 and 44.. A
llght pre88ure on the rlanges 34'and 36 18 normally surrlc.lent , to ~e~tthe arm 32 lnto the channel 22.
me ra¢t that the element 28 must be tllted about lto ,longltudlnal axi~ such that the stretch 48 leads when lnserted '~ through the openlng 26 and lnto the channel 22 permlto the , otretch 48'to be "nestedn'behln~ the leg 38 preventlng the element rrom belng pullod out Or the channel 22 ln re~ponse to any pulllng i ~orce th,ay.may.be appll d..thiough the materlal 12.ouch a~ by wlnds,¦
trotchlng oi otherwlse. In ract, a rorc'e ~uch ao~ust de~crlbed . .
t . 'would ten~ to tighten the clamplng actlon o~ the element 28 on.
~, 20 tho portlon 50 Or th~e materlal 'ln that the stretch 48 would be , , , , , .~ . . , . . .
. pulled lnto t~ghter contact wlth the materlal ln the reglon Or ,.
- the leg 38 and the lip 40. Th~ ribs 42 and 44 $ncrease the grip on the portion 50 of the material normally effecte~
, by the cooperating planar sides of the two bars to prevent $ its being pulled through the cavity 22 during the exertion ¦"'' of such previously mentioned tension. ', ' ' me.removal Or the ele~ent 28 to release the materlal , . . .
. . ~ . .
,l 12 rrom the assembly lO 1B easily accompllshed by insertlng a ',. , ,' sQrewdriver or other prylng tool behlnd the rlange 34 such that ~,' ',,1 30 the shank Or the screwdrlver plvots about the lip 40 whlch serves .',, ,j as a rulcru~ polnt and, by exertlng pres~ure on the handle Or the ,' .' ~crowdrlver Sn the dlrectlon Or the rramework 20 the arm 32 Or : ~ J
~ '''"-'^ ' ~:
1043~S4 the element 28 ie prted outwardly rrom the channel 22 thus re-lea~ng the latter and the clamped portlon 50 o.~ the material 12.
An alternate to the UBC Or a screwdrlv,er or othèr ~rylng tool 1~ the provlslon o~ an element lnsertlng and removlng tool (not shown) havlng elongated, oppooed llp~ wh~ch are.placed behlnd the stretch 48 and the rlsnge 34 to owlng the element 28 into and out Or the channel 22 as prevlously deocrlbed.
.-. ., Fro~ the roregoing deocrlption lt wlll be ~ppreciated ,that there:has been here dlsclosed a no~el assembly ror tho atta¢hment Or polyethylene rllm or other sheet material whl¢h pe~mlt~ qul¢k and e¢onomlcal lnstallatlon Or the oame ln a po~ltl~o manner doe~ not~have a tenden¢y to become loo~o or otherwlso unatta¢hed and does not regulre puncturing or other-~i~e tearlng/tge.materlal in order to rirmly attach the same. 1 i Tho as~embly 10 18 partlcularly wéll-oulted rOr use ln pro~ldin~
.
rolat~vely tlght enclosures whl¢h are Or a temporary nature and ~hl¢h are eubJo¢t to repeated-a~sembly and dloa~ombly. The ~ntcriocklng reature Or the assembly 10 permlt~ unllmlted ~ ro-u~e theroor lna~much as the-asoembly 10 18 not ouoceptlble ¦
¦ 20 to ~amago during the cour~e Or normal u~e. ; . ..' The kit as described above i~ believed to be the best embodiment of the present invention and ~ therefore ..
preferred. Yet, tho~e s~illed in the art will readily conceive further embodiments differing to a greater or le6ser degree from the preferred embodiment but still falling within the scope of the present invention as defined in the accompanying claims.
~I
, '30 , I - 8 - i .~D
.1 1
Fre~uently these structure~ are provided ~lth varlous temperature and other atmo~pherlc controlllng devlces whlch re~uire that the enclo~ure,be relatively tight to ~eal out the outslde weather yet must be Or a nature that permits at least partlal dlsas~embly durlng the Orr season whlle at the same tlme belng low cost both rrom the standpolnt Or ma-'terlal~ used and the labor involve~ ln assembly and dlsas~embly.
, Ih thls connectlon then, lt hae become a readlly ac-cepted practlce to employ the use o~ polyethylene rllm whlch horetorore has been attached to a rramework through the use Or lath~ or strlp~ Or wood whlch are nalled to the support ln such a,mannér that the rllm 18 dl~posed between tho lath and the ,eupport and thuo held ln place. Thls has been less than satl~-ractory, however, because Or the tendency ror;the plaetlc ma-ter~al to tear at the polnt that the nalls are drlven-through the lath an~ the ~ilm and because-,or the wlnd actlon whlch tends to caùse the rll~ to pull loose thus maklng the structure le~ than alr tlght ln addltlon damaging the polyethylene rllm.
~ It 1~ thererore a very lmportant obJect Or our lnven-tlon to provlde an assembly ror qulckly and eaolly a¢tachln~
oheet materlal ln the natuxe Or polyethylene rllm to a ~ra0e-~ork such a~ mlght be round ln the constructlon Or greenhouseo 'and the llke. - ' ' Another very lmportant obJect Or the lnventlon 18 to provlde an attachlng assembly ror sheet materlal ln whlch the msterlal 18 clamped by the assembly and held wlthout damage to ~the material such a8 by the puncturing of hole8 therein.
A ~t~ll ruither ~portant obJe-t Or our ln~entlo ~18 . _ . _ . . , . , _ _ . . .
: . .. .
1043~54 tho provlslon of a materla} holding assembly ln wh~ch the materlal ls po~ltlvely held-and ln whlch lncreased ten~lon on the.materlal wlll lncrease the grlp Or the as~embly on thc materlal thu~ clamplng lt tlghter.-. A stlll ~urther lmportant.obJect o~.the lnventlon 1~ the provl810n Or a ~aterlal holdlng assembly ln which ahoidlng element ls releasably held ln a channel withou~. the u~e o~ auxllllary ~asten~r~ yet wh1ch 18 capable o~ be~ng e~lly and qulckly removed rrom the channel.
Accord$ng to the present invention, a kit is provided for attaching sheet material to a support, said kit or the assembly being of the type including a first bar def ining a channel and a second bar complementary with said channel and adapted to be laterally inserted into the channel to thus grip a sheet material therebetween, Bai~ channel of ~aid fir~t bar being defined by a first l ~
~ide wall, a second side wall and a bottom wall extending .:
between interior margins of said side walls; said first ~ide wall being concavely curved to define an arcuate - 20 shape in lateral cross-section; said second side wall being generally planar and being of a width generally corresponding to the depth of said channel as measured at said second side wall; said side walls being so arranged ;
with respeot to each other that the width of said channel increase~ in a direction laterally away from said bottom wall, reaching its maximum at about mid-depth thereof and again decreasing in the direction to~aras exterior margi~s of said side walls; said second bar being of a lateral cross-:.
, "' "
ri ~ I "
*
. .
~043654 section generally complementary with the lateral cross-section of the channel of the first bar, said second bar including a first convexly curved side wall ana a second generally planar side ~all; said convexly curved side wall being ~e~erally comple~,entary with said concavely curved side wall, said second, generally planar side ~iall of the second bar being generally comple~entary with said side wall of the fir8~ bar~ where~y said second bar can be inserted into the channel of the first bar with a sheet disposed therebetween to grip the sheet between the respective side walls, the insertion being effected by moving said second bar generally laterally relative to the first bar such that the convex ~ide of the 8econd bar is first nested in the concave side wall and the second bar is then tilted to bring its generally planar side wall into a generally parallel relationship with the generally planar side wall of said channel, and whereby the ~eed for spreading apart the side walls of the first bar or contracting the side walls of the second bar when attaching a sheet is eliminated.
In the drawlngs: ~.
. ~ ~lgure 1. 18 a rragme,ntary pers~ectlve vlew or a greenhouse or the llke employlng the u~e Or a sheet materlal coverlng, such as polyethylene rllmJ whlch l~ attached to a ~ramework through the use Or an attachlng kit for sheet materlai made accordlnR to the present lnvent~on; - , - 2a -- - -11~4~
Flg. 2 1~ a rragmentary, enlarged, exploded, cross-sectlonal v~ew lllustratlng the relative dlspo~ltlons Or a i-base member and hold~ng element o~ the attaching assembly .wlth respect to the sheet materlal a~ they would appear lmmedl- ..
~até~y~pr`-ror to lnsertion o~ the materlal and the holdlng element lnto a channel Or the ba~e member;
Fig. 3 18 rragmentary, enlarged, cross-sectlonal vlew lllu~tratlng the holdlng element and the materlal partially ln-serted ln the channel Or the-base member; and ~lg. 4 i8 a rragmentary, enlarged, cross-sectlonal vlew ~lllustratlng the materlal holdlng as~embly as it would appear when ln clamplng engagement wlth the sheet materlal.
A kit, broadly desl~naeed bg the numeral 10, 18 provlded ror.the attachment or sheet materlal, 9uch as polyethylene rllm or the llke ldentirled by the numeral 12, ror use ln con--~ ~tructlng a greenhouse 14 or ror u~e ln other sltuatlono whero lt 1~ de~lred to.releasably hold a plece Or sheet materlalsuch a~ ror swlmmlng pool covers, 8110 covers, or ror cons~ructlon protection. --D~
I ' , , 10436S4 ~ -The kit 10 is comprised of an elongated base member 16 (also referred to as "a first bar"), adapted to be attached to a support, such as a sideboard 18, which in turn is affixed to a frame structure 20 of the greenhouse 14. The member 16 may be attached in any conventional manner such as through the use of flathead screws, (not shown) which cooperate with pre-punched holes (not shown) provided in the member 16.
The member 16 may be of any desired length depending on the particular application, with ten foot lengths normally being recommended, or may be cut into shorter lengths for following various contours such as for a gable end of the structure 20. Disposed longitudinally along the member 16 is a generally C-shaped channel 22 having an arcuate surfacé or first side wall 24 disposea tranQversely of the longitudinal axis of the member 16 and generally planar second siae wall 26 so that the width of the channel 22 first increases in the direction from the bottom wall to reach a maximum at about mid-aepth of the channel and then again decreases. The side wall extends perpendicularly to the bottom of the channel and thus - defines the depth of the channel.
The assembly 10 further includes an elongated material holding element 28 (also referred to as a ~second -~
bar") also being generally C-shaped in transverse cross-section corresponding to the configuration of the channel 22 and likewise including an arcuate surface or first side wall 30 disposed longitudinally therealong and transverse to the longitudinal axis of the element 28. It is to be here noted that the arc of curvature of the surface 24 of the channel 22 is somewhat larger than is the arc of curvature of the surface 30 of the element 18. An elongated arm 32 ~ 4 , 104;~6S4 defining a second, generally planar side wall of the second bar extends longitudinally along the entire length of the element 28 and defines the normally lower leg of the C-shaped element ~8. Elongated flange means 34 and 36, per-pendicular to the arms 32, extend longitudinally along the outer edge of the arm 32 and are disposed exteriorly of the channel 22 when the element 28 is nested therein.
As best seen in Figure 4, the lower flange 36 abuts against the outer edge of side wall 26 to thus limit the tilting movement of the two bars bringing their mutual arrangement from the state as in Figure 3 to that of Figure 4.
Means for retaining the element 28 in the channel 22 are provided in the form of an angular, normally down-wardly pro~ecting leg 38 which is a part of the member 16 and extenas longitudinally therealong ad~acent the normally upper edge of the channel 22, the transverse distance between the arm 32 and the leg 38 defining the-previously mentioned opening 26. The leg terminates in an arcuate, enlarged, material engageable lip 40 _ coextensive in length with the leg 38. A series of inter-~ locking, opposed and relatively offset gripping ribs ; 42 and 44 are provided on the arm 32 of the element 28 and on a normally lower arm 46 of the member 16 respectively.
~he ribs 42.and 44 extend longitudinally along their respective arms 32 and 46, the ribs 44 being disposed in the cavity 22 while the ribs 42 are on the normally lower or underside of the leg 32. A plastic or rubber beading, .
partially embedded in the arm 32, might be provided in lieu of the ribs 42; the beading being seated between the ribs 44 when the element 28 is inserted in to the channel 22. -: :
r. ~ ~
' ~`'; ~ S _ ~'., ' In addition to ~he~ eg 38 and the ribs 42 and 44, the element retaining means also includes an elongated, transversely arcuate stretch 48 extending longitudinally along the element 28 and defining the normally upper leg thereof. The stretch 48 is disposed behind the leg 38 when the element 28 is in the channel 22 such that the arcuate surfaces Z4 and 30 are in their opposed relationship.
The member 16 and the element 28 may be made of any convenient, durable, lightweight material such as extruded aluminum.
It will be appreciated on examination of Figure 4 that the clearance between respective side walls of the two bars generally corresponds to or is slightly less than t~Jice the thickness of sheet 12. When comparing Figur~ 3 and 4, and realizing that in both figures the sheet 12 is disposed between the two bars, it will be appreciated that the distance between the leading edge of the generally planar side wall of the second bar ~at the bottom left as viewed in Figure 3) and an imaginary line parallel with elongation of the second bar and most remote from the leading edge i~ less than the maximum width of the channel in the first bar. The said distance, of course, is in excess of the width of the second bar. The cross-sectional views of the drawing ~how a generally ideal dimensioning of the respective bars.
In u8e, the member 16 18 attached to the 81deboard 18 a8 prevlou81y de8crlbed and ln a po81tlon to permlt the materlal 12 to bo 8tretched oVer the 8tructure 20 as 8een ln Flg. 1. The ma-terial 12 18 then po81tloned relatlve to the member 16 ~uch that a portlon 50 o~ the materl~l 18 adJacent the openlng 26, lt belng noted that sur~lcient length 18 provlded to permlt the _ 6 -. ' ' ~ . : , ' ' ' 1043~54 materlal to extend beneath or beyond the assembly lO at all tlmes. The ele~ent 28 i~ then lnserted lnto the channel 22 such that the arcuate stretch 48 18 leadlng and enters the~
channel rlrst, rorcing the portlon 50 Or the materlal 12 through the openlng as ~een in Flg. 3. ~rter the,arcuate stretch 48 has been dl~posed behlnd the leg 38,.the arm 32 ls then pressed into the cavlty such that the portion 50 ls not only dl~posed between the member 16 and element 28 but l~ also ~clamped or grlpped between the cooperatlng rlbo 42 and 44.. A
llght pre88ure on the rlanges 34'and 36 18 normally surrlc.lent , to ~e~tthe arm 32 lnto the channel 22.
me ra¢t that the element 28 must be tllted about lto ,longltudlnal axi~ such that the stretch 48 leads when lnserted '~ through the openlng 26 and lnto the channel 22 permlto the , otretch 48'to be "nestedn'behln~ the leg 38 preventlng the element rrom belng pullod out Or the channel 22 ln re~ponse to any pulllng i ~orce th,ay.may.be appll d..thiough the materlal 12.ouch a~ by wlnds,¦
trotchlng oi otherwlse. In ract, a rorc'e ~uch ao~ust de~crlbed . .
t . 'would ten~ to tighten the clamplng actlon o~ the element 28 on.
~, 20 tho portlon 50 Or th~e materlal 'ln that the stretch 48 would be , , , , , .~ . . , . . .
. pulled lnto t~ghter contact wlth the materlal ln the reglon Or ,.
- the leg 38 and the lip 40. Th~ ribs 42 and 44 $ncrease the grip on the portion 50 of the material normally effecte~
, by the cooperating planar sides of the two bars to prevent $ its being pulled through the cavity 22 during the exertion ¦"'' of such previously mentioned tension. ', ' ' me.removal Or the ele~ent 28 to release the materlal , . . .
. . ~ . .
,l 12 rrom the assembly lO 1B easily accompllshed by insertlng a ',. , ,' sQrewdriver or other prylng tool behlnd the rlange 34 such that ~,' ',,1 30 the shank Or the screwdrlver plvots about the lip 40 whlch serves .',, ,j as a rulcru~ polnt and, by exertlng pres~ure on the handle Or the ,' .' ~crowdrlver Sn the dlrectlon Or the rramework 20 the arm 32 Or : ~ J
~ '''"-'^ ' ~:
1043~S4 the element 28 ie prted outwardly rrom the channel 22 thus re-lea~ng the latter and the clamped portlon 50 o.~ the material 12.
An alternate to the UBC Or a screwdrlv,er or othèr ~rylng tool 1~ the provlslon o~ an element lnsertlng and removlng tool (not shown) havlng elongated, oppooed llp~ wh~ch are.placed behlnd the stretch 48 and the rlsnge 34 to owlng the element 28 into and out Or the channel 22 as prevlously deocrlbed.
.-. ., Fro~ the roregoing deocrlption lt wlll be ~ppreciated ,that there:has been here dlsclosed a no~el assembly ror tho atta¢hment Or polyethylene rllm or other sheet material whl¢h pe~mlt~ qul¢k and e¢onomlcal lnstallatlon Or the oame ln a po~ltl~o manner doe~ not~have a tenden¢y to become loo~o or otherwlso unatta¢hed and does not regulre puncturing or other-~i~e tearlng/tge.materlal in order to rirmly attach the same. 1 i Tho as~embly 10 18 partlcularly wéll-oulted rOr use ln pro~ldin~
.
rolat~vely tlght enclosures whl¢h are Or a temporary nature and ~hl¢h are eubJo¢t to repeated-a~sembly and dloa~ombly. The ~ntcriocklng reature Or the assembly 10 permlt~ unllmlted ~ ro-u~e theroor lna~much as the-asoembly 10 18 not ouoceptlble ¦
¦ 20 to ~amago during the cour~e Or normal u~e. ; . ..' The kit as described above i~ believed to be the best embodiment of the present invention and ~ therefore ..
preferred. Yet, tho~e s~illed in the art will readily conceive further embodiments differing to a greater or le6ser degree from the preferred embodiment but still falling within the scope of the present invention as defined in the accompanying claims.
~I
, '30 , I - 8 - i .~D
.1 1
Claims (8)
1. A kit for attaching sheet material to a support, said kit being of the type including a first bar defining a channel and a second bar complementary with said channel and adapted to be laterally inserted into the channel to thus grip a sheet material therebetween, said channel of said first bar being defined by a first side wall, a second side wall and a bottom wall extending between interior margins of said side walls;
said first side wall being concavely curved to define an arcuate shape in lateral cross-section;
said second side wall being generally planar and being of a width generally corresponding to the depth of said channel as measured at said second side wall;
said side walls being so arranged with respect to each other that the width of said channel increases in a direction laterally away from said bottom wall, reaching its maximum at about mid-depth thereof and again decreasing in the direction towards the opening of said channel;
said second bar being of a lateral cross-section generally complementary with the lateral cross-section of the channel of the first bar, said second bar including a first convexly curved side wall and a second generally planar side wall;
whereby said second bar can be inserted into the channel of the first bar with a sheet disposed therebetween to grip the sheet between the respective side walls, the insertion being effected by moving said second bar generally laterally relative to the first bar such that the convex side of the second bar is first nested in the concave side wall and the second bar is then tilted to bring its generally planar side wall into a generally parallel relationship with the generally planar side wall of said channel, thus eliminating the need for spreading apart the side walls of the first bar or contracting the side walls of the second bar when securing a sheet between the bars.
said first side wall being concavely curved to define an arcuate shape in lateral cross-section;
said second side wall being generally planar and being of a width generally corresponding to the depth of said channel as measured at said second side wall;
said side walls being so arranged with respect to each other that the width of said channel increases in a direction laterally away from said bottom wall, reaching its maximum at about mid-depth thereof and again decreasing in the direction towards the opening of said channel;
said second bar being of a lateral cross-section generally complementary with the lateral cross-section of the channel of the first bar, said second bar including a first convexly curved side wall and a second generally planar side wall;
whereby said second bar can be inserted into the channel of the first bar with a sheet disposed therebetween to grip the sheet between the respective side walls, the insertion being effected by moving said second bar generally laterally relative to the first bar such that the convex side of the second bar is first nested in the concave side wall and the second bar is then tilted to bring its generally planar side wall into a generally parallel relationship with the generally planar side wall of said channel, thus eliminating the need for spreading apart the side walls of the first bar or contracting the side walls of the second bar when securing a sheet between the bars.
2. A kit as claimed in claim 1, wherein the width of said channel as measured between the side walls thereof is greater, by a predetermined value, than the respective width of the second bar, said predetermined value being between about the thickness of a sheet material with which the kit is to be used and about twice said thickness.
3. A kit as claimed in claim 2, wherein the generally planar side walls of the bars are provided with grip protrusions for gripping a sheet material therebetween, said grip protrusions being of the type of longitudinally extending interlocking ribs for gripping a portion of a sheet material between the second side walls of said bars.
4. A kit as claimed in claim 2, wherein said first bar and said second bar include abutment means arranged to abut against each other when the respective planar side walls are in a generally parallel relationship with the second bar disposed within said channel.
5. A kit as claimed in any of claims 2, 3 or 4 wherein the first bar is a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel bar.
6. A kit as claimed in any of claims 2, 3 or 4 wherein the first bar is a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel bar, said second bar also being a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel.
7. A kit as claimed in any of claims 2, 3 or 4 wherein the first bar is a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel bar, said second bar also being a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel, said second, generally planar side wall of the second bar defining a generally linear leading edge generally parallel with the elongation of said second bar and arranged to be disposed at the bottom of said channel when the two bars are interengaged;
the lateral distance between said leading edge and a line parallel with same, coincident with the convex side wall and most remote from said leading edge being greater than the width of said second bar as measured between the side walls thereof, but smaller than the maximum width of said channel.
the lateral distance between said leading edge and a line parallel with same, coincident with the convex side wall and most remote from said leading edge being greater than the width of said second bar as measured between the side walls thereof, but smaller than the maximum width of said channel.
8. A kit as claimed in any of claims 2, 3 or wherein the first bar is a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel bar, said second bar also being a substantially rigid bar whose rigidity generally correspond to the rigidity of an extrusion molded aluminum channel said first bar including means for securing the first bar to a support in an upright position whereby said channel is generally C-shaped in lateral cross-section with said convex side wall being an upper wall of the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA196,991A CA1043654A (en) | 1974-04-08 | 1974-04-08 | Kit for attaching sheet material to a support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA196,991A CA1043654A (en) | 1974-04-08 | 1974-04-08 | Kit for attaching sheet material to a support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043654A true CA1043654A (en) | 1978-12-05 |
Family
ID=4099659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA196,991A Expired CA1043654A (en) | 1974-04-08 | 1974-04-08 | Kit for attaching sheet material to a support |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1043654A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566239A (en) * | 1983-10-03 | 1986-01-28 | Smigel Robert L | Insulation system |
-
1974
- 1974-04-08 CA CA196,991A patent/CA1043654A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566239A (en) * | 1983-10-03 | 1986-01-28 | Smigel Robert L | Insulation system |
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