HK1052331B - Device for transferring a substance applied to a support tape in the form of a film to a substrate - Google Patents

Description

Device for transferring a film-like material applied to a carrier tape onto a substrate

Technical Field

The invention relates to a device for feeding a film-like material applied to a carrier tape to a substrate, such as writing or drawing paper, comprising a housing in which a supply reel for a film carrier tape and a take-up reel for receiving a film-removing carrier tape are arranged, wherein the film carrier tape is guided over a coating base with a coating edge surrounded by the film carrier tape.

Background

Such manual means of delivering films (e.g., adhesives, coatings, marking paints, etc.) are well known. In this respect, various embodiments of coating bases are known for the purpose of flexibility and good transport of the film onto the substrate. Thus, the application base can be equipped, for example, with an application roller which essentially has a rubber-elastic sliding surface. However, a properly functioning applicator roll cannot be kept free of any reduction in its outer diameter because good adhesion to the substrate requires a minimum thickness of the elastomeric ring and the rotational movement presupposes a sufficient difference between the shaft diameter and the outer diameter, which is disadvantageous. Most solutions are therefore generally to coat the base with a coating plate, which is advantageous for the coating roller since the carrier tape can be spread more accurately during the transport phase, whereby the contour after the transport has been completed is less likely to form a rocking edge. In contrast, the disadvantage of the solution with a coating roller is that the carrier tape is guided through it under friction on the coating plate, which leads to an undesirable inflexibility depending on the quality of the carrier tape.

For example, printed matter US4853074A discloses a device of this type. In this known device, in addition to the pressing edge, a forwardly projecting and rounded edge is provided at the end of the application plate turned toward the carrier film, which edge is arranged parallel to the pressing edge and is separated therefrom by a cut or depression, the radius of curvature of which is substantially smaller than the base edge of the pressing edge. The effect of the depression there in this respect is only that a spacing is formed between the two raised areas. This is said to improve the "ironing" of the adhesive profile edge onto the substrate. However, this solution has the disadvantage that it does not fundamentally improve the transfer of the film onto the substrate, but only ensures that the film is transferred onto the substrate at the beginning of the transfer process.

Such A device is also disclosed, for example, in US-A-5430904. In this device, the application base is fixed to the application base in the region surrounded by the carrier tape, with a sliding element made of a friction-reducing rubber-like material. The function of the slide element is to transport the film intact onto the substrate. However, the flexibility of the device and the transport of the film onto the substrate have proved to be still further improved.

Furthermore, EP 0360045 a2 discloses another such device. In this device, the application base has, adjacent to the application plate fixed to the free end, an end region which can be expanded relative to the application plate and which forms a pressing edge and consists of juxtaposed segments which can be elastically expanded substantially independently of one another perpendicular to the longitudinal center plane toward the application plate but are not elastic in the direction of the longitudinal center plane. These end regions are preferably formed by juxtaposed resilient leaves, but each leaf can be deflected completely independently of the adjacent leaf. Although a good fit with a rough-surfaced substrate can be achieved with such a coated base, such a coated base provided with several juxtaposed springs is relatively expensive to manufacture.

Disclosure of Invention

The object of the invention is therefore to improve such a device in such a way that it is possible to increase the flexibility and to transport the film to the substrate in a perfect manner in a manner which is as simple as possible, especially with a view to economical production.

This object is achieved according to the invention in a device of the aforementioned type in that the coating base is provided with at least one recess at least in its region facing the bottom side of the substrate.

In contrast to the known devices, the bottom edge of the coating base is not a flat surface in the region of or adjacent to the coating edge, but rather has a depression, so that the surface of the coating base in this region is larger than the coating surface of the carrier tape on the coating base, i.e. the contact surface between the coating base and the carrier tape is very small. This results in better slip, in particular in that little spreading occurs on the material layer to be transported (e.g. adhesive), and the carrier tape does not slip during use and remains stable in terms of running properties up to the tape end. No retardation occurs due to high friction. It is therefore not difficult to manufacture such a device, since only one-time new or retrofit (injection) tools are required.

In a particularly advantageous development, it is provided that the at least one depression extends up to the region of the application edge. Since the carrier tape is pressed against the application base during use, in particular in the region of the application edge, it is particularly advantageous if the contact surface is reduced in this region by the recesses.

In order to keep the contact surface between the carrier tape and the coating base as small as possible, it is advantageous to provide several recesses arranged side by side, which extend from the coating edge in the transport direction of the carrier tape.

In this respect, the recesses can be arranged side by side, they can also be arranged conically tapering towards the application edge, but also in other geometrical shapes.

In addition or alternatively, at least one recess in the transport direction and forming a receptacle for film residues can be arranged in front of the application edge perpendicular to the transport direction. Residues which are not transported to the substrate can be received by this receiving groove and do not impair the function of the device, in particular do not reach the area of the take-up reel. Thereby we further improve the flexibility of the device.

In a further advantageous development, it is also conceivable to provide the coating base with a recess on its upper side.

Drawings

The invention is described in detail below by way of example with the aid of the accompanying drawings. The attached drawings are as follows:

figure 1 is a perspective view of a coating base of the apparatus according to the invention,

figure 2 is a bottom view of the coated base coating board,

figure 3 is a front view of the coating panel arranged above with respect to the position of use,

figure 4 is a cross-sectional view taken along line a-a in figure 2,

figure 5 is a cross-sectional view taken along line B-B of figure 2,

figure 6 a side view of the coated panel of figure 3,

FIG. 7 is a bottom view of a coated base plate modified

Fig. 8 is a cross-sectional view taken along line a-a of fig. 7.

Detailed Description

Fig. 1 shows only that part of the device according to the invention for transferring a film-like material applied to a carrier tape onto a substrate which is of importance for the invention, namely a coating base, which is designated in essence as a whole by 1. The coating base 1 is provided with a coating panel 2 with a front coating edge 3, around which panel 2 a coating film carrier tape 4 is guided by a supply reel of the apparatus, not shown in the drawing. After the coating 5 has been applied to the substrate, the blank tape 6 is guided further onto a not-shown reel of the device, which is arranged in a not-shown housing of the device.

Viewed end-on in the transport direction, i.e. facing the application edge 3, the application plate 2 is provided in the usual manner at both ends of its underside with tape guide openings 7, between which the carrier tape 4 is guided from the tape supply reel of the device.

According to the invention, the coating base 1 is provided, at least in its bottom region facing the substrate, i.e. in its surface with the guide openings 7, in its region of the coating plate 2, preferably with a plurality of recesses 8 arranged substantially in the conveying direction, which in the present embodiment are arranged adjacent and juxtaposed to one another and parallel to the conveying direction. These recesses 8 preferably extend into the area of the application edge 3, these areas of the recesses 8 being indicated with 8 a. These groove-like depressions 8 and 8a provide that the coated panel 2 has a larger surface in this region than the surface of the carrier tape 4, so that the carrier tape 4 is applied to the coated panel 2 with only a small contact surface.

The depressions 8 or 8a can in principle be of any shape or arrangement, and the number of depressions 8 is in principle also arbitrary, it being understood that it depends on the specification of the coating plate 2. The groove-like depressions 8, 8a not only form a small contact surface for the carrier tape 4, but also ensure good transport of the roughened substrate.

In a non-illustrated embodiment, the recesses 8 can also be arranged tapering inward toward the application edge 3, i.e. the groove-shaped recesses 8 are not juxtaposed but are arranged tapering or tapering inward toward the front substantially symmetrically to the center axis. The shape of the recesses 8 shown in particular in fig. 5, although substantially saw-tooth-shaped, can of course also be of other geometric shapes.

Fig. 7 and 8 show other embodiments of the present invention. In contrast to the exemplary embodiment of fig. 1 to 6, it is additionally provided in this exemplary embodiment that, viewed in the conveying direction, at least one depression 9 is arranged perpendicular to the conveying direction in front of the application edge 3 and forms a receiving groove for film residues. Film residue can then be collected in this receiving groove 9 without entering the area of the take-up reel, thereby ensuring perfect take-up of the empty tape 6 and ensuring flexibility of the device.

Of course, the invention is not limited to the embodiments described. Other arrangements are possible without departing from the basic idea. Although this is not shown in the drawing, it is also conceivable according to the invention for the coating base 1 to have only one depression 9 perpendicular to the conveying direction, and for the coating plate 2 to be planar, i.e. to have no depression 8 or 8 a.

Claims (7)

1. Device for transferring a film-like material applied to a carrier tape to a substrate, comprising a housing, in which a supply reel for a film-coated carrier tape and a take-up reel for receiving a film-removed carrier tape are arranged, wherein the film-coated carrier tape is guided by a coating base with a coating edge surrounded by the film-coated carrier tape, the coating base being provided, at least in the region of its base edge facing the substrate, with at least one recess extending into the region of the coating edge, characterized in that the at least one recess (8, 8a) extends in the direction of transport of the carrier tape (4).

2. Device according to claim 1, characterized in that several recesses (8, 8a) are provided, arranged side by side.

3. Device according to claim 2, characterized in that the at least one recess (8, 8a) extends into the region of the application edge (3).

4. Device according to claim 2 or 3, characterized in that the recesses (8, 8a) are arranged tapering conically inward towards the application edge.

5. Device according to claim 1, characterized in that at least one additional recess (9) is arranged in front of the application edge (3) perpendicular to the transport direction, as seen in the transport direction, and forms a receiving groove for film residues.

6. Device according to claim 1, characterized in that a recess is also provided on the upper side of the coating base (1).

7. The device of claim 1, wherein said substrate is writing paper or drawing paper.