GB2202801A

GB2202801A - Jig for hot-foil stamping

Info

Publication number: GB2202801A
Application number: GB08706587A
Authority: GB
Inventors: Leo Feiner
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-03-19
Filing date: 1987-03-19
Publication date: 1988-10-05
Also published as: GB8706587D0

Abstract

A jig for use in a hot-foil stamping process is adapted to allow simultaneous embossing of both front and back leaves of a book of matches by recessing one edge-face for receiving the matches while the back leaf can lie on the roof of the recess. The latter is thinned and chamfered so as to enter between the array of matches and the back leaf with minimum bending of the latter. <IMAGE>

Description

JIG FOR XOT-FCIL STAMPING The present invention relates to a hot-foil stamping process using a specially adapted jig. Hot-foil stamping machines are used, for example, in gold blocking and may be of the vertical type (fixed platen) or the platen type (movable platen). In the former type the stamping head travels vertically towards the generally horizontal platen, while in the latter the platen pivots towards the stamping head. In all cases the jig for supporting the workpiece in true location is demountably secured to the platen.

The jig of the present invention is usable with either type of machine and is adapted for supporting a workpiece so formed as to have a part, not requiring stamping, that must lie in line with the stamping position. For example, without the use of the jig of the present invention it is possible to emboss the front leaf of a book of matches but not the back leaf.

The problem with simultaneous embossing of both leaves or, indeed, with embossing the back leaf at all, is due to the stiffness both of the array of matches and of the (usually) cardboard leaves. In order to press the inside of the back leaf to the jig so that the exterior is presented for stamping, the matches together with that part of the back leaf to which the matches are secured have to be bent away over the edge of the jig as shown in Fig. 1 . This cannot be done without damaging the natural rigidity of the back leaf and since the latter is usually of cardboard this would be left with a permanent crease and damage to the surface finish.

In order to overcome this difficulty the jig of the present invention is characterised in that it is formed with a hollow or recess providing space, at at least one edge-face, between the work surface of the jig and the platen adapted to accomodate part of the workpiece below the level of the stamping plane.

The recess can extend to form an aperture in any edge-face of the jig. An entire edge may be under-cut to form a wedge shape. It is now possible to spread both leaves of a book of matches on the work surface and emboss them simultaneously, as shown in Fig. 2.

Figures 3 - 5 show a preferred embodiment of the jig of the invention Fig. 3 shows the under-side of the jig.

Fig. 4 is a section on line A-A of Fig. 3.

Fig. 5 is the front elevation facing the operator.

In Fig. 3 the recess 1 extends approximately half-way across the jig and is chamfered at 2 as shown in Fig. 4 . The shoulders 3 of the recess and the portion 4 will lie on the platen as also will the clamping bar 5 . The latter is accomodated in a further recess 6 and held by screws. Additional screws 7 CFig. 5) are provided for securing the clamping bar to the platen in known manner.

As shown in Fig. 4 the jig is formed, from an originally parallelsided piece about 1 cm thick, to have a slightly sloping work surface thereby providing a ridge 8 to act as a stop. Alternatively, the jig is uniformly thick and a stop piece can be screwed on to it.

In yet an alternative embodiment the recess may be formed as a channel extending from one edge to an opposite edge.

In this description and in the accompanying statement of claim terms such as below' and (above are to be understood as designating, respectively, that aspect of the jig that is towards the platen and that aspect of the jig that is towards the stamping head.

Claims

1. A method for hot-foil stamping adapted for use with a workpiece having a portion that must underlie the stamping position wherein the jig used for supporting the workpiece is adapted to receive the said portion of the workpiece in a hollow or recess formed within the thickness of the jig and forming an aperture in at least one of the edge-faces of the jig.

2. A jig as described in claim 1.

3. A jig as in claim 2 where the underside of the jig is cut away to form a recess extending to one or more of the edge-faces.

4. A jig as in claim 3 where the roof of the recessed portion has its thickness further reduced towards the aperture in the edge-face ( or edge-faces) by chamfering to give~a knife-edge, or nearly so, with the work surface.

5. A jig as in any preceding claim in which the aperture (or apertures) is (or are) substantially rectangular in cross-section.

6. A jig as in any preceding claim where the recess forms a channel between opposite edge-faces.

7. A jig as in any of claims 2 to 5 in which the recess is generally uedge-shaped,

8. A jig as in claim 7 in which the wedge shape extends across the entire width of the edge-face, or edge-faces, in question.

9. A jig substantially as described with reference to the drawings of figures 2 to 5 accompanying the specification.

10. A method of hot-foil stamping employing a jig constructed according to any of claims 3 to 9.