CA1037813A - Unitary fastening device for loose leaf binder - Google Patents
Unitary fastening device for loose leaf binderInfo
- Publication number
- CA1037813A CA1037813A CA211,575A CA211575A CA1037813A CA 1037813 A CA1037813 A CA 1037813A CA 211575 A CA211575 A CA 211575A CA 1037813 A CA1037813 A CA 1037813A
- Authority
- CA
- Canada
- Prior art keywords
- plate
- legs
- holes
- leg
- sheets
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
- B42F13/00—Filing appliances with means for engaging perforations or slots
- B42F13/02—Filing appliances with means for engaging perforations or slots with flexible or resilient means
Abstract
ABSTRACT OF THE DISCLOSURE
This invention is directed to a fastening device for the releasable fastening of perforated sheet-like items.
It consists of a one-piece moulding comprising a first plate having two legs for insertion through holes in the sheet-like items, and a second plate having holes through which the legs fit. The second plate is detachably coupled to the first plate. When the device is to be used, the second plate is detached and the legs on the first plate are passed through the holes in the items and in the second plate. The legs are then bent through 90° and brought into engagement with a spring-like fastening device on the upper side of the second plate.
This invention is directed to a fastening device for the releasable fastening of perforated sheet-like items.
It consists of a one-piece moulding comprising a first plate having two legs for insertion through holes in the sheet-like items, and a second plate having holes through which the legs fit. The second plate is detachably coupled to the first plate. When the device is to be used, the second plate is detached and the legs on the first plate are passed through the holes in the items and in the second plate. The legs are then bent through 90° and brought into engagement with a spring-like fastening device on the upper side of the second plate.
Description
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- SPECIAL FASTE~ING DEVICE F~R DOCU~ENT FILING
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The invention relate6 to a fastening device for releasable fa6tening oS perforated sheet-like item6, and consist6 partly of a plate with two legs interacting with two holes ln the said items and p~rtly of ~` a plate wlth holes ~itted for penetratlon Or the two legs.
FaeteniDg devices of the said deslgn are applled especially for the Sillng of documents etc. provided wlth at lea6t two holes at unifor~
lntervals.
Documents for lnsertionlln letter fillngs are provided wlth uniform r', holes punched for appllcatlon on the two leg6 o~ the locking arrantement fixed to the inner side of the cover.
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... ,. . - . ~ , . . . .
loa7sl3 When a spring file of the said kind is fully filled up~ or a certaln period has elapsed, it may be required to remove the contents to permanent files for 6ubsequent use. Known for this purpose are file straps, meant for u~e in connection with unlocked file fasteners, and which after the shift of the said documents to the file strap is attached to the legs of the strap by way of some kind of blocking of the sheets or documents preventing them! fro~ the possibility Or slipping off the said legs of the strap.
Known is for example a file strap consisting of a plate with a plastic covered metal wire fastened in a manner allowing bending of the wire to for~ two bendable legs to which the gheets may be removed. After the operation the two legs are ben;t to a right angle around the stack of papers, thus preventing the sheets from slipping~
This file strap is encumbered with 6everal inconvenlences. ~rimarily the plast covered metal wire is unsuited for repeated use, as the metal when bent to an angle becomeg deformed in a manner that prevents full 6traightening out of the wire, when the leg is unbent. A small bulge is formed cauging that it becomes impossible after repeated use to place unobstructedly the documents on or re~ove them from the legs.
Add to this the occurring fatigue of the material, which effects breaking of the wire, thus rendering the strap ungerviceable~ It is moreover complicated to embed guch a metal wire into plastic, as the wire frequently tends to be squeezed by the tool6 during the manufacture, or the metal wire may corrode and discolour the documents, when they are filed in damp surroundings.
Known is also another type of file strap consisting of a soft hose penetrating through two holes of a hard cover in such a manner that the two legs of the soft hose protrude from the cover at a distance fro~ each other n tting the holes in the paper sheets. ~he documents are transferred to these two legs, after which a semi-rigid strap is inserted on the legs, to which strap the 6heet6 may be removed, when the latter legg are firmly gqueezed in a detachable upper part provided with a locking slot for the entering of the legs.
The mentioned strap offers llkewise several inconveniences. It is first of all extremely dlfncult to ghift the documents to the 60ft logs, as the legs during the operation will y~d and bend when exposed "~ .
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to end pressure during the attempt. Transfer of sheets to the legs must be attempted with a few sheets at a time, which im-pairs the availability of the system. There is further the complication involved that a strap must be inserted after the squeezing of the legs to secure them from slipping out of the squeeze and accordingly out of the locked state.
An object of the present invention is to provide an improved device for releasably fastening perforated sheets.
According to the invention, the device includes a first plate having two legs for engagement in perforations in sheets to be fastened, and a second plate having holes to receive said legs. The second plate includes, at its outer side, spring-like fastening means for releasably securing said legs.
The device is in the form of a one-piece moulding of a elastic plastic material and the second plate is detachably coupled to the first plate so that the second plate can be separated from -the first plate when the device is to be used. The said legs can then be inserted through the perforations in the sheets and through appropriate holes in the second plate, bent through approximately 90, and engaged with said spring-like fastening ~
means to releasably secure the legs. -By means of the said construction, the plate and the two legs, which after placing of the papers on the legs allows bending and releasable locking to a plate with holes, is achieved an extremely simple and wearable filing unit. The legs are made of an especially suit~ed plastic material, which will stand bending almost incessantly without losing rigidity or resilience. The B
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:;, . : ... . : :
'" 103q813 homogenous legs are very strong and so rigid that they can easily penetrate the holes of the pile of paper. Smudging of the docu-ments is avoided, as the material remains unaffected by moisture or other for instance chemical effects. The spring-like fast-ening device is moreover extremely handy, as the squeezing of the leg into the lock is indicated unmistakeably audibly when the leg is engaged, just as it is easy to feel when the leg is in the correct location. Furthermore, the lock is easily dis-engaged by raising the leg from the spring locks of the plate, after which the legs can be straightened out, and the documents removed with no effort at all.
The casting of plate and legs in one, renders the manu- -facture extremely expedient, offering a constant certainty of having the correct number of parts available, and results further-more in an extremely rational manufacture of the parts in one -operation of one machine.
By the use of the fastening device, is achieved a very simple and extremely reliable fastening of the legs, a device which is moreover easy to operate even with a minimum of finger strength. In addition, the lock requires an uncompli-cated manufacture in one operation only together with the plate with holes of a material warranting that the lips will yield to the legs, allowing them to encase the leg on their return to normal position.
In order th~t the invention may be more clearly under- ;
stood, reference will now be made to the accompanying drawings, in which:
1~ . ' .
Fig 1 6how6 the part6 after the casting ln one operation Fig 2 6how6 the parts separated ready for use Fig 3 6how6 the parts assembled for fastenlng of documents Fig 4 show6 the plate with the hole6 and the spring locks of n gure 4 viewed fro~ above Fig 5 shows a section V-V of a spring lock of f$gure 4 Fig 6 6hows a section of VI-VI of a spring lock and o~ one leg of figure 10 Fig ? shows the bottom plate with holes for the legs viewed fro~ below Fig 8 show6 one leg viewed from the side Fig 9 shows one leg from the narrow side Fig 10 6hows a locked 6trap viewed from above Fig 11 6hows a section YI-XI of the 6ame 6trap af figure 10.
With reference to the figure6 ~ - 3 the file 6trap consist6 of two parts viz. a plate 6 with two legs ~ located on the same side of the plate 6.
The plate 6 i8 plane on the bottom side i.e. the side oppo6ite of the legs, by which i8 achieved that the parts 6,1 can rest on a plane level, whlch facilitates the work of ingerting paper sheets etc. on the member.
The legs are situated at mutual intervals equal to the intervals between the holes of the paper sheets to be filed~ The legs are of unlform 6~ape and at the outmost end provided with an indentation at the end plane 4, which said indentation is intended for fixation or the legs Or the letter file by their pointed ends.
The other part of the nle strap consists of a plate 2 partly provided with holes 7 for interaction with the legs 1 and partly with two faetening device6 3 for lnteraction with the leg6 1 during their f~stening at the filing operation, as de6cribed below.
The two parts 6,1 and 2,3 are preferably manufactured in one ca6ting proces6, 60 that they afte~ the casting appear as 6pecified in figure 1. , , . . ' . '' , .
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When a user has acquired a strap like this, he must 6eparate the parts at the point of assembly 5 at the end of the plate 2 with the holes and the center of the plate 6 between the legs ~.
The plate 2 with the holes i~ as mentioned proYided with two locking devices 3 at the ends~ These locks consists of two sets of lips formlng between them a slot 8. The said slot 8 is intended for the leg6 1, when they are to be n r~ly locked. Abo~e, i.e. at the remotest point from the plate 2, the lips are closest to each other, so that the lip8 3 must yield when the leg6 are pressed pa6t their opening.
During the opening procedure the slot i6 widened, attaining at last ~-the thickness of the legs 1, which can thu6 pas6 in under the lip6 to be encased a6 6hown in figure 3.
A6 the plastic material of which the part6 are produced is very elastic the lips will be able to keep the legs in the desired position in a very safe and simple way.
The application of the fastenin,g device can be described as follows: -The parts being separated as shown in figure 2. In case of shifts of psper sheets from a letter file, the lock of the latter is released and the legs 1 are directed to the poi~ted legs, which are intercepted and fised in the lndention 4 near the ends of the legs.Now all sheet6 can easily and effortless be transferred to the legs 1, When all the sheets have been removed the plate 2 with the holes is placed on top Or the papers with the plane side downwards and the legs } i~ the holes 7. The plate 2 with the hole6 is pregsed against the ~heets to ob~tain a more compact stack. Subsequently the two legs are bent apart and brought to bear against the upper side of the plate with the hole6, and with the legs in the slot 8 of the lock. Thls permits the downward pressing of the legs between the lips 3, as shown in figure 3, and the paper sheets are locked together. If it is required to remove one or 6everal 6heets, the leg6 are raised free of the s~ring lock 3, then 6traightened up, apd the plate 2 with the holes is removed, after which the 6heets may be llfted off the legs 1.
The pre6ent filing arran~ement can of cour6e al60 be used for fastening Or papers to be inse~ted direct into the sy6tem i.e. without pre~ious insertion in a letter file. In the latter case is made u~e of the 6pecial feature of the part 6,1 with the leg6 permitting an un6upported stand, which facilitate6 the in6ertion of document6 .
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considerably.
Another embodiment of the invention, as shown in figures 4 - 11 18 described below.
A6 lt appears from figure 4 the plate with the hole6 1~5 con6i6t6 of an oblong plate with two spring-like fasters 14/~L7~ The plate 15 18 pro~rided with a 6eries of holes 1~6, corresponding with the holes 1~ in the bottomi plate 9, as shown in figure 7. These hole6 11,16 are 6ituated in the plate6 9,15 in such a manner that their lntervals mutually f$t in with the standard application of hole6 governing paper 6heets, data proce66ing copie6, formula6 etc.
~igures 8 and 9 show the legs, which are at the one end furni6hed wlth a plate 12, functioning as an end stop to theleg, when the latter is inserted into the hole 1~ in the plate 9. To secure that the legs 611p out of the plate 9 the leg is provided with a couple Or thlcken$ngs 13, which can be 6ituated diametrically oppo~ite to each other. The thickening 13 is tapered, inclining from the leg toward6 the end stop 12, to be cut off perpendicularly to the leg ~or the formation of a contact 6urface for the body of the plate 9r ~hen the leg i6 attached to the plate, a6 shown in figure lI.
The purpo6e of the tapering of the sa$d thickenings 3~sto facil~tate thelr penetrating through the hole 11, bringing about easier yielding o f the sides o f the hole for the thlckening. ~hen the thickenings have passed the ho~e the sides of the hole will return to their original posit$on and secur~ aga$nst d$slocation of the leg ln relation to the plate 9.
Withdrawal of the legs Srom the hole 11 requires slightly more strength to press the sides sufficiently apart to allow pas6ing of the thickening613.
The shape of the leg6 appears Srom the sectional view of figure 6.
The cross section of the legs 10 is flattened to facilitate their
- SPECIAL FASTE~ING DEVICE F~R DOCU~ENT FILING
: ~.
; . .
. :
.. . .
,. . - - .
;; .
The invention relate6 to a fastening device for releasable fa6tening oS perforated sheet-like item6, and consist6 partly of a plate with two legs interacting with two holes ln the said items and p~rtly of ~` a plate wlth holes ~itted for penetratlon Or the two legs.
FaeteniDg devices of the said deslgn are applled especially for the Sillng of documents etc. provided wlth at lea6t two holes at unifor~
lntervals.
Documents for lnsertionlln letter fillngs are provided wlth uniform r', holes punched for appllcatlon on the two leg6 o~ the locking arrantement fixed to the inner side of the cover.
~ ~ .
.~, . . .
,~ . - . ...
,. .. . .
... ,. . - . ~ , . . . .
loa7sl3 When a spring file of the said kind is fully filled up~ or a certaln period has elapsed, it may be required to remove the contents to permanent files for 6ubsequent use. Known for this purpose are file straps, meant for u~e in connection with unlocked file fasteners, and which after the shift of the said documents to the file strap is attached to the legs of the strap by way of some kind of blocking of the sheets or documents preventing them! fro~ the possibility Or slipping off the said legs of the strap.
Known is for example a file strap consisting of a plate with a plastic covered metal wire fastened in a manner allowing bending of the wire to for~ two bendable legs to which the gheets may be removed. After the operation the two legs are ben;t to a right angle around the stack of papers, thus preventing the sheets from slipping~
This file strap is encumbered with 6everal inconvenlences. ~rimarily the plast covered metal wire is unsuited for repeated use, as the metal when bent to an angle becomeg deformed in a manner that prevents full 6traightening out of the wire, when the leg is unbent. A small bulge is formed cauging that it becomes impossible after repeated use to place unobstructedly the documents on or re~ove them from the legs.
Add to this the occurring fatigue of the material, which effects breaking of the wire, thus rendering the strap ungerviceable~ It is moreover complicated to embed guch a metal wire into plastic, as the wire frequently tends to be squeezed by the tool6 during the manufacture, or the metal wire may corrode and discolour the documents, when they are filed in damp surroundings.
Known is also another type of file strap consisting of a soft hose penetrating through two holes of a hard cover in such a manner that the two legs of the soft hose protrude from the cover at a distance fro~ each other n tting the holes in the paper sheets. ~he documents are transferred to these two legs, after which a semi-rigid strap is inserted on the legs, to which strap the 6heet6 may be removed, when the latter legg are firmly gqueezed in a detachable upper part provided with a locking slot for the entering of the legs.
The mentioned strap offers llkewise several inconveniences. It is first of all extremely dlfncult to ghift the documents to the 60ft logs, as the legs during the operation will y~d and bend when exposed "~ .
~ .
. ~ . . .. . ..
to end pressure during the attempt. Transfer of sheets to the legs must be attempted with a few sheets at a time, which im-pairs the availability of the system. There is further the complication involved that a strap must be inserted after the squeezing of the legs to secure them from slipping out of the squeeze and accordingly out of the locked state.
An object of the present invention is to provide an improved device for releasably fastening perforated sheets.
According to the invention, the device includes a first plate having two legs for engagement in perforations in sheets to be fastened, and a second plate having holes to receive said legs. The second plate includes, at its outer side, spring-like fastening means for releasably securing said legs.
The device is in the form of a one-piece moulding of a elastic plastic material and the second plate is detachably coupled to the first plate so that the second plate can be separated from -the first plate when the device is to be used. The said legs can then be inserted through the perforations in the sheets and through appropriate holes in the second plate, bent through approximately 90, and engaged with said spring-like fastening ~
means to releasably secure the legs. -By means of the said construction, the plate and the two legs, which after placing of the papers on the legs allows bending and releasable locking to a plate with holes, is achieved an extremely simple and wearable filing unit. The legs are made of an especially suit~ed plastic material, which will stand bending almost incessantly without losing rigidity or resilience. The B
;
:;, . : ... . : :
'" 103q813 homogenous legs are very strong and so rigid that they can easily penetrate the holes of the pile of paper. Smudging of the docu-ments is avoided, as the material remains unaffected by moisture or other for instance chemical effects. The spring-like fast-ening device is moreover extremely handy, as the squeezing of the leg into the lock is indicated unmistakeably audibly when the leg is engaged, just as it is easy to feel when the leg is in the correct location. Furthermore, the lock is easily dis-engaged by raising the leg from the spring locks of the plate, after which the legs can be straightened out, and the documents removed with no effort at all.
The casting of plate and legs in one, renders the manu- -facture extremely expedient, offering a constant certainty of having the correct number of parts available, and results further-more in an extremely rational manufacture of the parts in one -operation of one machine.
By the use of the fastening device, is achieved a very simple and extremely reliable fastening of the legs, a device which is moreover easy to operate even with a minimum of finger strength. In addition, the lock requires an uncompli-cated manufacture in one operation only together with the plate with holes of a material warranting that the lips will yield to the legs, allowing them to encase the leg on their return to normal position.
In order th~t the invention may be more clearly under- ;
stood, reference will now be made to the accompanying drawings, in which:
1~ . ' .
Fig 1 6how6 the part6 after the casting ln one operation Fig 2 6how6 the parts separated ready for use Fig 3 6how6 the parts assembled for fastenlng of documents Fig 4 show6 the plate with the hole6 and the spring locks of n gure 4 viewed fro~ above Fig 5 shows a section V-V of a spring lock of f$gure 4 Fig 6 6hows a section of VI-VI of a spring lock and o~ one leg of figure 10 Fig ? shows the bottom plate with holes for the legs viewed fro~ below Fig 8 show6 one leg viewed from the side Fig 9 shows one leg from the narrow side Fig 10 6hows a locked 6trap viewed from above Fig 11 6hows a section YI-XI of the 6ame 6trap af figure 10.
With reference to the figure6 ~ - 3 the file 6trap consist6 of two parts viz. a plate 6 with two legs ~ located on the same side of the plate 6.
The plate 6 i8 plane on the bottom side i.e. the side oppo6ite of the legs, by which i8 achieved that the parts 6,1 can rest on a plane level, whlch facilitates the work of ingerting paper sheets etc. on the member.
The legs are situated at mutual intervals equal to the intervals between the holes of the paper sheets to be filed~ The legs are of unlform 6~ape and at the outmost end provided with an indentation at the end plane 4, which said indentation is intended for fixation or the legs Or the letter file by their pointed ends.
The other part of the nle strap consists of a plate 2 partly provided with holes 7 for interaction with the legs 1 and partly with two faetening device6 3 for lnteraction with the leg6 1 during their f~stening at the filing operation, as de6cribed below.
The two parts 6,1 and 2,3 are preferably manufactured in one ca6ting proces6, 60 that they afte~ the casting appear as 6pecified in figure 1. , , . . ' . '' , .
~ - .
When a user has acquired a strap like this, he must 6eparate the parts at the point of assembly 5 at the end of the plate 2 with the holes and the center of the plate 6 between the legs ~.
The plate 2 with the holes i~ as mentioned proYided with two locking devices 3 at the ends~ These locks consists of two sets of lips formlng between them a slot 8. The said slot 8 is intended for the leg6 1, when they are to be n r~ly locked. Abo~e, i.e. at the remotest point from the plate 2, the lips are closest to each other, so that the lip8 3 must yield when the leg6 are pressed pa6t their opening.
During the opening procedure the slot i6 widened, attaining at last ~-the thickness of the legs 1, which can thu6 pas6 in under the lip6 to be encased a6 6hown in figure 3.
A6 the plastic material of which the part6 are produced is very elastic the lips will be able to keep the legs in the desired position in a very safe and simple way.
The application of the fastenin,g device can be described as follows: -The parts being separated as shown in figure 2. In case of shifts of psper sheets from a letter file, the lock of the latter is released and the legs 1 are directed to the poi~ted legs, which are intercepted and fised in the lndention 4 near the ends of the legs.Now all sheet6 can easily and effortless be transferred to the legs 1, When all the sheets have been removed the plate 2 with the holes is placed on top Or the papers with the plane side downwards and the legs } i~ the holes 7. The plate 2 with the hole6 is pregsed against the ~heets to ob~tain a more compact stack. Subsequently the two legs are bent apart and brought to bear against the upper side of the plate with the hole6, and with the legs in the slot 8 of the lock. Thls permits the downward pressing of the legs between the lips 3, as shown in figure 3, and the paper sheets are locked together. If it is required to remove one or 6everal 6heets, the leg6 are raised free of the s~ring lock 3, then 6traightened up, apd the plate 2 with the holes is removed, after which the 6heets may be llfted off the legs 1.
The pre6ent filing arran~ement can of cour6e al60 be used for fastening Or papers to be inse~ted direct into the sy6tem i.e. without pre~ious insertion in a letter file. In the latter case is made u~e of the 6pecial feature of the part 6,1 with the leg6 permitting an un6upported stand, which facilitate6 the in6ertion of document6 .
:` . . .', ' ' ''' ' . ' . . .~- . ,'' ' ': " - , , ' "'.' : . . : . ' ' ' . , : ' ' .
considerably.
Another embodiment of the invention, as shown in figures 4 - 11 18 described below.
A6 lt appears from figure 4 the plate with the hole6 1~5 con6i6t6 of an oblong plate with two spring-like fasters 14/~L7~ The plate 15 18 pro~rided with a 6eries of holes 1~6, corresponding with the holes 1~ in the bottomi plate 9, as shown in figure 7. These hole6 11,16 are 6ituated in the plate6 9,15 in such a manner that their lntervals mutually f$t in with the standard application of hole6 governing paper 6heets, data proce66ing copie6, formula6 etc.
~igures 8 and 9 show the legs, which are at the one end furni6hed wlth a plate 12, functioning as an end stop to theleg, when the latter is inserted into the hole 1~ in the plate 9. To secure that the legs 611p out of the plate 9 the leg is provided with a couple Or thlcken$ngs 13, which can be 6ituated diametrically oppo~ite to each other. The thickening 13 is tapered, inclining from the leg toward6 the end stop 12, to be cut off perpendicularly to the leg ~or the formation of a contact 6urface for the body of the plate 9r ~hen the leg i6 attached to the plate, a6 shown in figure lI.
The purpo6e of the tapering of the sa$d thickenings 3~sto facil~tate thelr penetrating through the hole 11, bringing about easier yielding o f the sides o f the hole for the thlckening. ~hen the thickenings have passed the ho~e the sides of the hole will return to their original posit$on and secur~ aga$nst d$slocation of the leg ln relation to the plate 9.
Withdrawal of the legs Srom the hole 11 requires slightly more strength to press the sides sufficiently apart to allow pas6ing of the thickening613.
The shape of the leg6 appears Srom the sectional view of figure 6.
The cross section of the legs 10 is flattened to facilitate their
2`ixation to the plate 9, the hole~ 11 being of the same shape.
~lereby the leg is secureld against turning $n the plate 9. It $8 Surthermore an advantage that the factor of resistance is lowest ln the tlrection in which the leg must be bent to be fastened by the spring lock 14,17, and an additional advantage that the oblong 6h~lpe oS the cro66 6ection more ea6ily allows penetration between the yielding lip8 14.- It $8, as $t appears Srom figure 3, po661ble . ~ .. : . , , .. : .: ~ . , : . ., - :
' .. . ~; ~ . . , :
10378~3 to twist the leg out of the grip of the lip8, and this fact makes it vastly easier to place the legs lO between the lip6 14 during fastening.
As it appears Srom figures 4 and lO, the two spring-like fastening devices 14~1~ are dislocated in relation to the center line of the plate 15, a feature which, as already mentioned, allows the placing oS the legs side by side in their fastened position, a6 shown in Sigure6 10 and l~.
This cir6un~stance does not preventS however, placing of the legs lO
ln th~ two holes 11,16 nearest t~ the center, to be used for fastening oS sheet6 with minimum interval between the holes, a~; the le~ are then bent away from the center to be fir~ly locked opposite to the bend towards the center shown.
The legs as shown are provided with a cylindrica~ end stop 12t but there is of course nothing to prevent that the end of the stop $8 made angular to secure against turning o f the legs, as the side edges oS the end stop in the said case will collide with the downward stretching side edges of the bottom plate.
I S the fastening arrangement is to function as a permanent locking device for a spring Sile or a filing dossier the bottom plate 9 may in certain cases be left out. The cover can be provided with holes through which the legs can be fastened in the same manner as they are attached to the bottom plate 9~ In the said case only two leg6 and a plate with holes and spring locks are needed.
In case the cover is made oS plastic or i~ plast foil papered the legs may furthermore be welded on for instance by way of ultra-sound.
In case lt 16 de6ired to u6e the whole 6trap for or ~ volume only, the bottom plate with the legs may be Sixed to the inner side of the cover by way oS rivets, Sor instRnce without previous punchin6 Or holes in plate and cover.
~uting oS two or all the sides oS the le~s may lmprove the servlce of t~e strap, allowlng an easler turn into ~1 locked posltion, and preventing sllpplng Srom the legs Or th~ fingers when handl~ng the nle. :
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The above specifications deal exclu6ively with paper sheets and documents to be filed by way of the invention. It is, however, obvious that even other items 6uch as samples of textile, foil or the llke can be filed and fastened, in 60 far as the sald ob~ects being provided with at lea6t two hole6 for penetration of the legs.
~either ha6 any regard been paid to the dimension6 of the individual part6 of the arrangement. It can of cour6e be produced small- or big- - -6ized according to any de6ired practical purpose~ It iB for instance fea~ible to bundle newspaper6 or ~agazinee by way of the the described fastening6~
The device can be manufactured in all colour6t which may lighten the task of filing considerably, if the same colour is used for alle materials belonging together. The plate can be labelled for recordinga or directly written upon.
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" ' ~ . ' ` ' ' ' ' ~, ,,' ;' ' .
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~lereby the leg is secureld against turning $n the plate 9. It $8 Surthermore an advantage that the factor of resistance is lowest ln the tlrection in which the leg must be bent to be fastened by the spring lock 14,17, and an additional advantage that the oblong 6h~lpe oS the cro66 6ection more ea6ily allows penetration between the yielding lip8 14.- It $8, as $t appears Srom figure 3, po661ble . ~ .. : . , , .. : .: ~ . , : . ., - :
' .. . ~; ~ . . , :
10378~3 to twist the leg out of the grip of the lip8, and this fact makes it vastly easier to place the legs lO between the lip6 14 during fastening.
As it appears Srom figures 4 and lO, the two spring-like fastening devices 14~1~ are dislocated in relation to the center line of the plate 15, a feature which, as already mentioned, allows the placing oS the legs side by side in their fastened position, a6 shown in Sigure6 10 and l~.
This cir6un~stance does not preventS however, placing of the legs lO
ln th~ two holes 11,16 nearest t~ the center, to be used for fastening oS sheet6 with minimum interval between the holes, a~; the le~ are then bent away from the center to be fir~ly locked opposite to the bend towards the center shown.
The legs as shown are provided with a cylindrica~ end stop 12t but there is of course nothing to prevent that the end of the stop $8 made angular to secure against turning o f the legs, as the side edges oS the end stop in the said case will collide with the downward stretching side edges of the bottom plate.
I S the fastening arrangement is to function as a permanent locking device for a spring Sile or a filing dossier the bottom plate 9 may in certain cases be left out. The cover can be provided with holes through which the legs can be fastened in the same manner as they are attached to the bottom plate 9~ In the said case only two leg6 and a plate with holes and spring locks are needed.
In case the cover is made oS plastic or i~ plast foil papered the legs may furthermore be welded on for instance by way of ultra-sound.
In case lt 16 de6ired to u6e the whole 6trap for or ~ volume only, the bottom plate with the legs may be Sixed to the inner side of the cover by way oS rivets, Sor instRnce without previous punchin6 Or holes in plate and cover.
~uting oS two or all the sides oS the le~s may lmprove the servlce of t~e strap, allowlng an easler turn into ~1 locked posltion, and preventing sllpplng Srom the legs Or th~ fingers when handl~ng the nle. :
t - -~
:. . .
. .. . . , .. ~ . . . .
The above specifications deal exclu6ively with paper sheets and documents to be filed by way of the invention. It is, however, obvious that even other items 6uch as samples of textile, foil or the llke can be filed and fastened, in 60 far as the sald ob~ects being provided with at lea6t two hole6 for penetration of the legs.
~either ha6 any regard been paid to the dimension6 of the individual part6 of the arrangement. It can of cour6e be produced small- or big- - -6ized according to any de6ired practical purpose~ It iB for instance fea~ible to bundle newspaper6 or ~agazinee by way of the the described fastening6~
The device can be manufactured in all colour6t which may lighten the task of filing considerably, if the same colour is used for alle materials belonging together. The plate can be labelled for recordinga or directly written upon.
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" ' ~ . ' ` ' ' ' ' ~, ,,' ;' ' .
, ` ': ' ' ~: ,.,.,: . :
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for releasably fastening perforated sheets, the device including a first plate having two legs for engage-ment in perforations in said sheets, and a second plate having holes to receive said legs, wherein said second plate includes, at its outer side, spring-like fastening means for releasably securing said legs, wherein the device is in the form of a one-piece moulding of an elastic plastic material, and wherein said second plate is detachably coupled to said first plate so that the second plate can be separated from the first plate when the device is to be used, whereby said legs can be inserted through the perforations in said sheets and through appropriate holes in said second plate, bent through approximately 90°, and engaged with said spring-like fastening means to releasably secure the legs.
2. A device according to claim 1, wherein said fastening means of said second plate comprises, for each of said legs, two oppositely-disposed yielding lips which project from said plate and define therebetween a slot to receive the relevant leg, said slot being disposed on a centre line which coincides with the centre line of said holes in the plate, and the slot having a mouth which is narrower than the diameter of said leg.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK562173A DK562173A (en) | 1973-10-17 | 1973-10-17 | |
| DK513474 | 1974-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1037813A true CA1037813A (en) | 1978-09-05 |
Family
ID=26067752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA211,575A Expired CA1037813A (en) | 1973-10-17 | 1974-10-16 | Unitary fastening device for loose leaf binder |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS50112123A (en) |
| CA (1) | CA1037813A (en) |
| FR (1) | FR2248159B3 (en) |
| GB (1) | GB1489223A (en) |
| NL (1) | NL7413618A (en) |
| SE (1) | SE7412995L (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685700A (en) * | 1984-10-22 | 1987-08-11 | Velo Bind, Inc. | Bookbinding strips and method of binding books |
| GB2311255A (en) * | 1996-03-22 | 1997-09-24 | Taiwan Star Enterprises Co Ltd | Filing folder with filing strip or rods retained beneath lugs of hold down plate |
| JP4305171B2 (en) * | 2003-06-23 | 2009-07-29 | コクヨ株式会社 | Binding tools and files |
| JP4895787B2 (en) * | 2006-12-04 | 2012-03-14 | 株式会社キングジム | Binding tool |
-
1974
- 1974-10-16 CA CA211,575A patent/CA1037813A/en not_active Expired
- 1974-10-16 JP JP11917374A patent/JPS50112123A/ja active Pending
- 1974-10-16 FR FR7434737A patent/FR2248159B3/fr not_active Expired
- 1974-10-16 NL NL7413618A patent/NL7413618A/en unknown
- 1974-10-16 SE SE7412995A patent/SE7412995L/xx not_active Application Discontinuation
- 1974-10-17 GB GB4506174A patent/GB1489223A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50112123A (en) | 1975-09-03 |
| FR2248159B3 (en) | 1977-07-22 |
| FR2248159A1 (en) | 1975-05-16 |
| GB1489223A (en) | 1977-10-19 |
| NL7413618A (en) | 1975-04-21 |
| SE7412995L (en) | 1975-04-18 |
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