Bookbinding: process and apparatus – Apparatus
Patent
1986-08-22
1987-12-01
Bell, Paul A.
Bookbinding: process and apparatus
Apparatus
282 29R, 282 29B, B42B 900
Patent
active
047100842
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for the application of a strip along a side edge on a sheet-formed piece of material, said strip being provided with an adhesive area and preferably with holes for use in the filing of the sheet.
When a sheet is to be filed in a loose-leaf binder or the like, this is normally effected by perforating or by insertion in a pocket which is provided with holes in the side.
The perforation is carried out in the margin of the sheet itself by means of a punching machine arranged for this purpose, and since the material has a low tearing strength, the hole is easily torn open. The filing is thus unsafe and dangerous for the reliability of the file. Moreover, frequent removals and insertions will easily weaken the perforation, and thus this form of filing must be said to be of relatively poor value.
For the improvement of this form of filing, reinforcing rings are known which can be stuck around the holes and which strengthen the edge zone of the holes. The disadvantage here is the difficulty in mounting these rings.
A further drawback with the perforating of sheets is that one thereby perforates the sheet's margin, thus correspondingly limiting the effective area.
Filing by inserting the sheet in a pocket with finished holes is suitable in cases where a single and relatively stiff sheet is involved, since these allow easy insertion. The disadvantage is the inconvenience in placing the sheet in the pocket and in removing it for use. With thin sheets this can, in fact, be very difficult, and it is particularly easy for the tearing off of larger or smaller parts to occur during the removal from the pocket. In addition to this there is the price of the pocket and the space which the pocket takes up in the file. Finally, there is the disadvantage of static electricity, which especially in dry surroundings can easily result in inconvenience to the operating personnel.
The object of the invention is to remedy these drawbacks and disadvantages of the said known filing procedures, and this is achieved with an apparatus which is comprised partly of a bottom which, at its one side, is provided with a hinge to which a clamping plate is secured, partly by one or more upwardly extending pins on which one or more strips with a hole for each pin are placed, in that the clamping plate can rest on the non-adhesive part of the strip, and partly of a support part for the sheet, which resting hereon can lie up against the pins.
By means of this apparatus, a strip can be applied along one or more side edges of a sheet in a simple and easy manner, and it becomes possible to mount such filing strips so quickly and precisely that the filing becomes completely uniform and thereby safe. Since use can be made of a plastic strip which is both light and strong, i.e. tear-proof and flexible, a hitherto unknown possibility is achieved for efficient filing of sheets with plastic strips in, for example, a loose-leaf binder, and notably a particularly hard-wearing form of perforation. By a suitable choice of the colour of the strip, one can also index the sheets to suit requirements. If one wishes to remove the strip, this can easily be cut off, thus leaving a reinforcing strip on the sheet, which can be expedient when the sheet is subject to frequent use.
By providing the apparatus with adjustable guides for the sheet, as presented in claim 2, the apparatus can be used for different sheet widths.
Finally, as presented in claim 3, it is expedient to provide the apparatus with the possibility of adjustment of the guide pins in accordance with the size of the sheet.
The invention will now be described in closer detail with reference to the drawing, where
FIG. 1 shows the empty apparatus seen in perspective
FIG. 2 shows the apparatus with strips inserted and a sheet during the application of a strip, and
FIG. 3 shows a sheet partly in section with a strip applied.
In FIG. 1 is shown an example of a preferred embodiment of an apparatus according to the invention for use in the application of a strip on a sheet.
The
REFERENCES:
patent: 3752504 (1973-08-01), Dixon
patent: 4369582 (1983-01-01), Pfeffer
patent: 4580815 (1986-04-01), Barber
Bell Paul A.
Brdr. Ludvigsen, Tommfrup APS
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