US3321849A

US3321849A - Writing pads or tablets

Info

Publication number: US3321849A
Application number: US388407A
Authority: US
Inventors: Reginald V Langbart
Original assignee: R V LANGBART Ltd
Current assignee: R V LANGBART Ltd
Priority date: 1964-08-10
Filing date: 1964-08-10
Publication date: 1967-05-30
Anticipated expiration: 1984-05-30

Description

May 30, 1967 R. V. LANGBART WRITING PADS OR TABLETS Fiied Aug. 10, 1964 2 Sheets-Sheet l INVENTOR y 1967 R. v. LANGBART WRITING PADS OR TABLETS 2 Sheets-Sheet 2 Filed Aug. 10, 1964 T R A R 00 T TM M N EL/ 6 V V A N D f L 1. A A m N m Y E B R United States Patent 3,321,849 WRITING PAD 0R TABLETS Reginaid V. Langbart, Northampton, England, assignor to R. V. Langhart Limited, trading as T. X. lProdnets Co.

Filed Aug. 10, 1964, Ser. No. 388,407 2 tClaims. (tCl. 35-61) This invention is for improvements in or relating to writing pads or tablets of the type having a semi-trans parent sheet of material sandwiched between a sheet or plate covered with a dark coloured adhesive layer and a protective sheet such that when the semi-transparent sheet of material is pressed onto the dark coloured adhesive layer an image of the areas of the semi-transparent sheet which have been pressed onto the dark coloured adhesive layer become visible. The protective sheet is usually a transparent sheet, such as for example, celluloid.

The tablet or writing pad which this invention is concerned with is such that notes may be written by means of an instrument having a blunt or rounded end which presses the semi-transparent sheet into contact with the adhesive layer and obliteration of the Written matter is efiected by means which separate the semi-transparent sheet from the adhesive layer.

It is with means for effecting the separation that the present invention is particularly concerned.

In particular, the present invention provides a writing pad of the type described having a slider extending the width of the tablet and extending between the semi-transparent sheet of material and the dark coloured adhesive layer, said slider having a pair of slots separated by finger engaging means and a flexible band secured adjacent either end of the pad and extending through the slots in the slider so that the slider may move freely from one end of the pad to the other so as to separate the semi-transparent sheet from the dark coloured adhesive layer. Con- Veniently the band is of flexible plastic material and is secured to the underside of the base for the pad. Conveniently also the slider is of moulded plastic material, formed from sheet plastic material the slots and the finger engaging means being stamped or pressed out or otherwise moulded during the formation of the slider.

In order that the present invention may be more readily understood reference will now be made to the accompanying drawings, in which:

FIGURE 1 is a perspective View of a writing pad or tablet according to the present invention;

FIGURE 2 is a cross sectional view thereof;

FIGURE 3 is a detailed perspective view of a slider and flexible band according to the present invention;

FIGURE 4 is a partly exploded view of an alternative construction of a writing pad or tablet according to the present invention;

FIGURE 5 is a plan view of FIGURE 4.

In FIGURES 1, 2 and 3 there is illustrated a baseboard 1, on which is secured, as a separate unit, a writing pad or tablet according to the present invention. The Writing pad comprises a layer 2 of transparent material which has beneath it a sheet of semi-transparent material and beneath that sheet a layer or dark coloured adhesive material. A slider 3 extends beneath the layer of semi-transparent material and above the layer or dark coloured adhesive material and is slidable along the length of the pad by having a pair of slots 7 through which a band 4 of flexible plastic material extends. The band 4 is turned over and secured to the underside of a board 5. Finger engaging means 8 comprising raised rim apertures sepa- Tilt: uipstanding projections 13 formed when forming the s o s It will be appreciated that the slider 3 may be moved freely along the length of the pad and is located in position by its connection to the band 4.

In the construction illustrated in FIGURES 1, 2 and 3 the pad is preformed as a separate unit and is then secured to the board 1.

In the construction illustrated in FIGURES 4 and 5 the writing pad and surrounding board are formed as one unit and comprise a rear face 9 and a front face 10, which may be folded from a unitary shape of reinforced material such as, for example, cardboard. The front face It has a cut out aperture 11 through which the writing pad 12 is observed. The writing pad 12 consists as previously described of a layer of transparent material a, a layer of semi-transparent material 12 and a layer of dark coloured adhesive material 0. The flexible band 4 is secured to the rear face 9 and the slider 3 is as described, with reference to FIGURES 1, 2 and 3. After locating the writing pad with the band 4 and slider 3 relative to the rear face 9 the front face 10 may then be secured thereto by applying adhesive around the edges, thus forming a unitary construction on which printed material may be applied surrounding the aperture 11.

It will be appreciated that the present invention provides a novel and convenient form of slider for use With writing pads or tablets of the type described.

The invention has particular application for the formation of writing pads or tablets for use by children wherein printed matter suitable for children may surround the writing pads or tablets.

It will also be appreciated that the present invention provides a construction which is particularly simple to manufacture and which is comparatively cheap in cost since the materials involved to provide a satisfactory separation of the semi-transparent sheet from the dark coloured adhesive layer are themselves of comparatively cheap and simple form.

What I claim is:

I. A writing pad of the type described having a slider extending the width of the tablet and extending between the semi-transparent sheet of material and the dark coloured adhesive layer, said slider having a pair of slots separated by finger engaging means, and a flexible band secured adjacent to either end of the pad, and extending through the slots in the slider, so that the slider may move freely from one end of the pad to the other, to separate the semi-transparent sheet from the dark coloured adhesive layer.

2. A pad according to claim 1 in which the band is formed of flexible synthetic plastics material, and is secured to the underside of the base of the pad.

References Cited FOREIGN PATENTS 1,178,213 12/1958 France.

EUGENE R. CAPOZIO, Primary Examiner. H. S. SKOGQUIST, Assistant Examiner.

Claims

1. A WRITING PAD OF THE TYPE DESCRIBED HAVING A SLIDER EXTENDING THE WIDTH OF THE TABLET AND EXTENDING BETWEEN THE SEMI-TRANSPARENT SHEET OF MATERIAL AND THE DARK COLOURED ADHESIVE LAYER, SAID SLIDER HAVING A PAIR OF SLOTS SEPARATED BY FINGER ENGAGING MEANS, AND A FLEXIBLE BAND SECURED ADJACENT TO EITHER END OF THE PAD , AND EXTENDING THROUGH THE SLOTS IN THE SLIDER, SO THAT THE SLIDER MAY MOVE FREELY FROM ONE END OF THE PAD TO THE OTHER, TO SEPARATE THE SEMI-TRANSPARENT SHEET FROM THE DARK COLOURED ADHESIVE LAYER.