WO1988010170A1

WO1988010170A1 - Debris catcher

Info

Publication number: WO1988010170A1
Application number: PCT/GB1988/000487
Authority: WO
Inventors: Ian Bennett
Original assignee: Ian Bennett
Priority date: 1987-06-25
Filing date: 1988-06-22
Publication date: 1988-12-29
Also published as: GB8714970D0; AU1962288A

Abstract

A foldable sheet (1) for formation into a device for catching debris in a rectangular sheet of paper, with support adhesive (4) applied onto one surface (2) thereof at one edge (3), and interconnection adhesive (8, 9) applied onto the other surface (5) thereof at two further edges (6, 7) of the sheet adjacent the one edge. The sheet is foldable between the further edges (6, 7) for securement of the sheet to itself at the interconnection adhesive (8, 9) and for formation of a pouch with an opening (18) between a fourth edge (17) of the sheet and the one edge (3). The pouch can be supported on an upright worksurface (16) below a working position (15) to catch debris falling from the working position through the opening.

Description

Debris Catcher

Field of the Invention

The present invention relates to a device for catching debris from a working position on a worksurface, in particular but not exclusively from a hole being drilled in a wall. Background of the Invention

Various mechanisms are known for catching dust from drilled holes particularly in ceilings. However these are intended to be fixed on the hand tool and/or the drill bit per se. Such devices are described in:-

U.S. Patent Specification No: 3,934,661, U.S. Patent Specification No: 3,583,821, French Patent Specification No: 2,441,455, German Patent Specification No: 2,229,446. These devices are relatively expensive and depend to an extent on the debris falling under gravity in the general direction of ^• the drill bit's axis. As such they are unsuitable for use in collection of debris falling down the face of a wall.

Pads of rectangular sheets of paper having a strip of low tack adhesive on the back surface only are well known under the trade mark POST-IT. The Invention

The object of the invention is to provide a device for catching debris from a working position on an upright worksurface.

In one aspect a device in accordance with the invention comprises a pouch of sheet material, the pouch havi_.ng:- two leaves of the sheet material, an opening between the two leaves along one side, a fold in the sheet material along a side opposite the open side, the fold connecting the two leaves, interconnections between the two leaves along two further sides, each further side extending between the open side and the folded side, and support adhesive applied to an outer surface of one leaf at the open side, the arrangement of the pouch being such that the support adhesive can support it on an upright worksurface below a working position to catch debris falling from the working position through the opening. Preferably the extent at the opening between the interconnections of the one leaf having the support adhesive is less than the corresponding extent of the other leaf at the opening, whereby when in use the pouch is secured by the support adhesive to the worksurface along the said extent of the one leaf, the other leaf can be spaced from the adherred leaf to provide an open mouth at the opening.

Conveniently the sheet material is of sufficient stiffness that these relative extents of the leaves at the opening exhibits itself as a bow of the other, outer, leaf and an automatic opening of the mouth.

Whilst it is envisaged that the .sheet material may be of plastics material for instance, in which case the interconnections can be welded, in the preferred embodiment it is paper and the interconnections are provided by means of interconnection adhesive applied onto the inner surface of the one leaf and/or the other leaf.

By use of paper and adhesive, preferably pre-applied, the device can be formed as and when required, with the folding and interconnecting conveniently being carried out after adherring of the device to the wall in its required position. Preferably the sheet of paper is so cut to shape that when the other leaf is so adherred to the one leaf to provide the open mouth, the free edges of the other leaf at the further sides are spaced from the free edges of the one leaf leaving marginal portions thereof at least at the open side.

It is envisaged that the sheet could diverge downwardly from the fold before folding so that the further edges of the two leaves are aligned when folded up and adherred to give a bowed, open mouth with no marginal portions. However, in the preferred embodiment, the sheet is rectangular providing the marginal portions. These result by arranging the further edges of the outer leaf to converge upwardly. It is advantageous for the interconnection adhesive to be applied onto the one leaf to extend at both further sides thereof over respective areas including the said marginal portions. Thus the marginal portions of the one loaf can be folded over edge portions of the other, bowed, leaf and secured thereto by the interconnection adhesive.

Conveniently, two lines are printed on the inner surface of the one leaf to indicate the intended positions at which the further edges of the other leaf are to be adherred to provide that the latter is bowed.

In another aspect of the invention, there is provided a foldable sheet for formation into a device for catching debris, the sheet having:- four edges, support adhesive applied onto one surface thereof at one - edge, and interconnection adhesive applied onto the other surface thereof at two further edges of the sheet adjacent the one edge; the sheet being foldable between the further edges for securement of the sheet to itself at the interconnection adhesive and for formation of a pouch with an opening between a fourth edge of the sheet and the one edge having the support adhesive, the arrangement of the pouch being such that it can be supported on an upright worksurface below a working position to catch debris falling from the working position through the opening. Preferably the sheets are arranged superimposed in a block, the support and interconnection adhesives being of low tack self-adhesive material allowing the sheets to be individually removed from the block for use. This arrangement has the advantage that the devices can be stored in small space and formed in position for use when required. Tσ help understanding of the invention, a specific embodiment thereof will now be described with reference to the accompanying drawings, in which:- The Drawings Figure 1 shows the outer, in use, surface of a debris catcher sheet of the invention;

Figure 2 shows the inner surface of the debris catcher sheet of Figure 1;

Figure 3 shows the sheet of Figure 1 in position on a wall and partially folded for use;

Figure 4 similarly shows the sheet after additional folding;

Figure 5 shows the device ready for use; Figure 6 shows the device in use; and Figure 7 shows a block of sheets as shown in Figure 1. The Preferred Embodiment

• In the preferred embodiment, the debris catcher is formed from a sheet 1 of paper, shown in Figure 1. The paper is 60 giti/m² in weight. It has pre-applied onto one surface 2 at one edge 3 a strip 4 of low tack adhesive for supporting the device in use position.

On the other surface 5 at two further edges 6,7 the sheet 1 has respective areas 8,9 of pre-applied adhesive extending from the edge 3 or close thereto as far along the edges 6,7 as their mid-position or indeed approximately half way between the mid-position and a fourth edge 17. An intended fold line 10 (explained below) is indicated as a chain-dotted line extending between the mid-positions on the edges 6, 7 or between positions close to the mid-positions. From these positions printed lines 11,12 extend obliquely across the adhesive areas 8,9 to the edge 3. The areas 8,9 of adhesive are for interconnecting leaves 13,14 of the sheet 1 respectively above and below the fold line 10.

For use in for instance catching debris falling from a hole being drilled at 15 in a wall 16, see Figure 6, the sheet is secured by the support adhesive close below the hole 15 with the one edge 3 approximately horizontal, see Figure 3. The adhesive being low-tack in nature, the device (to be folded up from the sheet 1) can be readily removed from the wall without damaging it e.g. without lifting paint. For formation of the sheet 1 into a pouch to catch the debris, firstly the portion 6' of one further edge 6 between the fold line 10 and a fourth edge 17 of the paper is_. aligned with the respective printed line 11 and the sheet is adherred to itself by means of that portion of the adhesive 8 positioned inwards of the line 11.

This operation is repeated at the opposite further edge 7 of the sheet with the corresponding edge portion 7 ' being positioned along the line 12, see Figure 4. The sheet is thus formed into a pouch comprised of the leaves 13,14 connected at the fold line 10 along one side and interconnected by the adhesive at two further sides. It should be noted that it is unnecessary for the paper to be creased at the fold line 10. Because the support adhesive 4 constrains the leaf 13 to be flat at its upper edge 3 and this edge has a shorter effective length or extent 3' than the effective length 17' of the fourth edge 17 when folded up, the result is that the edge 17 bows away from the wall 16 forming an open mouth 18 below the hole 15. This bow results from the paper of the sheet being stiff and from the sheet be; ng rectangular. When the fourth edge 17 i_s folded up and adherred in position with one end 6" on the line 11 and the other end 7" on the line 12, its effective length or extent is its original length. However the effective length of the edge 3 is shorter by the sum of distance from each line 11,12^' to each end 11 ',12' of the edge 3. After initial folding, there remain marginal portions 8 ',9' of the interconnection adhesive on marginal portions of the leaf 13. These can be folded and adherred over the edge 6 ',7' of the leaf 14 to further secure the interconnection of the leaves. The device is then ready for use as shown in Figure 5. Since the support adhesive 4 is low tack, the device can be re-used at other holes until the adhesive loses its grip.

Figure 6 shows a block 21 of sheets 1. Each sheet is adherred to the one below it and the one above it both by the support adhesive on one side and the interconnection adhesive on the other side. Since the adhesive is low-tack adhesive, the sheets are readily removable individually from the pad. If the adhesive is such that although the sheets can be readily separated where the adhesive on one sheet is opposite plain paper on the other, yet they cannot be readily separated where interconnection adhesive is opposite support adhesive; then the interconnection adhesive can be spaced from the upper edge of each sheet by the width of the strip of support adhesive. This is shown in Figure 2. Alternatively, the interconnection adhesive can extend to the edge 3 and the support adhesive be spaced from the further edges 6,7 by the width of the interconnection adhesive areas.

Interconnection at fold line 10 is improved if the interconnection adhesive 8,9 extends in both directions along the further edges 6,7 from the fold line 10. However, it should stop short of the fourth edge 17, to allow a corner of the top sheet at the edge 17 to be raised for removal of the sheet from the block.

Claims

Claims :

1. A device for catching debris comprising: a pouch of sheet material, the pouch having:- two leaves of the sheet material, an opening between the two leaves along one side, a folC in the sheet material along a side opposite the open side, the fold connecting the two leaves, interconnections between the two leaves along two further sides, each further side extending between the open side and the folded side, and support adhesive applied to an outer surface of one leaf at the open side, the arrangement of the pouch being such that the support adhesive can support it on an upright worksurface below a working position to catch debris falling from the working position through the opening.

2. A device as claimed in claim 1, wherein the extent at the opening between the interconnections of the one leaf having the support adhesive is less than the corresponding extent of the other leaf at the opening, whereby when in use the pouch is secured by the support adhesive to the worksurface along the said extent of the one leaf, the other leaf can be spaced from the adherred leaf to provide an open mouth at the opening.

3. A device as claimed in claim 2, wherein the sheet material is of a stiffness to cause the other leaf to bow away from the one, adherred, leaf in use.

4. A device as claimed in claim 3, wherein the sheet material is paper and the interconnections are provided by means of interconnection adhesive applied onto the inner surface of the one leaf and/or the other leaf.

5. A device as claimed in claim 4, wherein the sheet material of the pouch is so cut to shape that when the other leaf is so adherred to the one leaf to provide the open mouth, the free edges of the other leaf at the further sides are spaced from the free edges of the one leaf leaving marginal portions thereof at least at the open side.

6. A device as claimed in claim 5, wherein the interconnection adhesive is applied onto the one leaf and extends at both further sides thereof over respective areas including the said marginal portions and the marginal portions of the one leaf are folded over edge portions of the other, bowed, leaf and secured thereto by the interconnection adhesive.

7. A device as claimed in claim 4, claim 5, or claim 6, including two lines printed on the inner surface of the one leaf to indicate the intended positions at which the further edges of the other leaf are to be adherred to provide that the latter is bowed.

8. A device as claimed in any preceding claim, wherein the support adhesive and/or the interconnection adhesive is self- adhesive material.

9. A device as claimed in claim 8, wherein the self adhesive material is low tack adhesive.

10. A foldable sheet for formation into a device for catching debris, the sheet having:- four edges, support adhesive applied onto one surface thereof at one edge, and interconnection adhesive applied onto the other surface thereof at two further edges of the sheet adj^'acent the one edge; the sheet being foldable between the further edges for securement of the sheet to itself at the interconnection adhesive and for formation of a pouch with an opening between a fourth edge of the sheet and the one edge having the support adhesive, the arrangement of the pouch being such that it can be supported on an upright worksurface below a working position to catch debris falling from the working position through the opening. ^'

11. A foldable sheet as claimed in claim 10, wherein the sheet is so cut to shape that when the sheet is folded and adherred to itself to form the pouch with an open mouth due to the extent of the fourth edge between the two further edges being greater than the extent of the one edge between positions thereat of adherrence of the further edges, then marginal portions of the sheet extend from the said positions of adherrence to the corners between the one edge and the two further edges.

12. A foldable sheet as claimed in claim 11, wherein the sheet is rectangular.

13. A foldable sheet as claimed in claim 11 or claim 12, wherein the interconnection adhesive covers the marginal portions of the other surface, whereby the marginal portions of the sheet having the interconnection adhesive can be folded over the already adherred portions of the further edges and further adherred thereto.

14. A foldable sheet as claimed in claim 11, claim 12 or claim 13 wherein lines are printed on the other surface to indicate the intended positions of adherrence and extent of the marginal portions of the sheet.

15. A foldable sheet as claimed in any of claims 10 to 14, wherein the material of the sheet is stiff paper.

16. A foldable sheet as claimed in any one of claims 10 to

15, wherein the interconnection adhesive and the support adhesive cover non-overlapping areas on opposite sides of the sheet.

17. foldable sheet as claimed in any one of claims 10 to

16, in combination with a plurality of other identical sheets superimposed to form a block, the support and interconnection adhesives being of low tack self-adhesive material allowing the sheets to be individually removed from the block for use.