CN1976817B - Scrapers for paint scrapers for paint removal - Google Patents

Abstract

This invention discloses a scraper for a paint scraper machine for removing paint from a surface. The scraper includes at least one scraping edge (5, 6), which is divided into at least two abutting portions (7.1, 7.2, 7.3, 8.1, 8.2) extending along the scraping edge. The abutting portions extend transversely to the scraping direction during the scraping action. Each abutting portion (7.1, 7.2, 7.3, 8.1, 8.2) protrudes within the plane of the scraping edge (5, 6), thus producing an effective scraping effect. This invention also discloses a paint scraper machine including the scraper.

Description

Scrapers for paint scrapers for paint removal

technical field

The invention relates to a scraper blade for a paint scraper for removing paint from a surface, the scraper blade comprising at least one scraper edge divided into at least two abutment portions extending along the scraper edge, said abutment portions being Extend transversely to the scraping direction when abutting against the scraping action. Furthermore, the invention relates to a paint scraper comprising said doctor blade.

Background technique

Most existing paint scrapers, i.e. tools with a blade for removing paint from a painted surface, usually have a blade with a straight/flat edge that acts on the surface so that the entire blade rests against the on the surface. In essence, a linear abutment surface is formed against said surface. Therefore, a great force is required to pierce the upper lacquer layer, so that the blade can thereby "grab" and pierce through the lacquer layer as far as the bottom surface which should be exposed. In order to solve this problem, the blade of the existing paint scraper has such a blade, that is, the blade is provided with sharp scraping teeth, and therefore, the blade is designed as a saw blade.

GB208,317 discloses a paint scraper, the blade of the paint scraper is arranged in a plate perpendicular to the handle, and the blade of the blade is provided with sharp teeth.

US 4,200,948 describes a paint scraper having a blade holder with a holder groove in which a blade is detachably mounted. The blade has two distinct, opposing edges. The first edge is straight and smooth, while the second edge is serrated and has sharp teeth.

US 4,759,092 discloses a scraper provided with a detachable serrated blade.

US 3,789,450 describes a tool for a painter comprising an angled blade with a first straight edge and a second edge comprising a straight edge portion and an edge portion with angled tines.

GB 1,265,189 discloses a tool for removing paint comprising a plurality of metal blades with serrated edges and pointed teeth.

US 4,704,795 describes a scraper device equipped with a scraper in the form of a conventional hacksaw blade.

The preamble of claim 1 is based on US 3,530,524. US3,530,524 discloses a scraper blade for a paint scraper for removing paint from a surface, the scraper blade comprises a scraper edge, the scraper edge is divided into a plurality of abutment parts extending along the scraper edge, the abutment portion When performing a scraping action, it extends transversely to the scraping direction. These abutment portions extend parallel to said surface.

The sharp or angled scraping teeth of the blades of the paint scrapers and tools described above easily penetrate the upper paint layer so that the blade can thereby "grab" and penetrate the paint layer to the bottom surface. However, the design of the blade with sharp, pointy or angled scraping teeth can cause the blade to scratch and damage, in some cases, uneven bottom surfaces during paint removal, and can easily become trapped and Do not rest against the surface to be reached. Furthermore, the scraping effect of paint scrapers with pointed scraping teeth is not good, since the abutment surface of the sharp scraping teeth against the surface is very small.

purpose of invention

It is therefore an object of the present invention to provide a scraper and a paint scraper which require less force to remove coverings, especially paint, from a surface without scratching and damaging the underlying surface and which have an effective scrape effect.

Contents of the invention

The above object is achieved by providing a scraper blade for a paint scraper for removing paint from a surface, wherein the scraper blade comprises at least one blade which is divided into at least two abutment portions extending along said blade, the The abutting portion extends transversely to the scraping direction when abutting against the scraping action, and is characterized in that each abutting portion protrudes in the plane of the scraping blade, thereby obtaining an effective scraping effect. The abutment portion is the portion that engages with a covering, such as a paint layer, and provides a scratch-off effect on said covering. In this respect, it is assumed that the covering covering the different surfaces, such as the paint layer, is substantially soft.

By means of the raised abutment part, during the scraping action of the abutment, scraping abutment points in several different planes are obtained in the paint, thus providing, compared with conventional scrapers, a rougher surface of the paint A scraper that is more effective in scraping off layers of varnish and smoother layers of lacquer. The scraping abutment points located in several different planes in the paint result in less force being required to remove the paint when scraping the surface, thereby making it easier to scrape and will The risk of damaging the surface beneath the paint is minimized. Furthermore, the protrusion of the abutment portion leads to avoiding damage to the surface in the form of scratches, since there is no risk of scratching the surface with sharp edges.

According to an advantageous embodiment of the doctor blade according to the invention, each abutment portion is continuous in the plane of said doctor blade and each abutment portion extends continuously along a continuous curve.

According to another advantageous embodiment of the doctor blade according to the invention, said scraping edge is corrugated in the plane of said scraping edge, and each abutment portion forms a part of the crest of the wave form. This embodiment is especially suitable for relatively rough paint surfaces and paint layers with many valleys and peaks. The scraping edge may also be corrugated transversely to the plane of the scraping edge. This provides an abutment that is displaced in the scraping direction, but also intensifies the scraping effect of the scraper.

According to yet another advantageous embodiment of the doctor blade according to the invention, the longitudinal extensions of said abutment portions have different lengths. This further intensifies the scraping effect, especially in the case of rough paint surfaces and layers, and during the scraping action the abutment part is prevented from entering by another abutment part with the same longitudinal extension. in the formed trench.

According to a further advantageous embodiment of the doctor blade according to the invention, each abutment portion, when abutting, forms an angle with said surface in the plane of said doctor edge, which angle is always smaller than 90°, preferably smaller than 30°.

According to another advantageous embodiment of the doctor blade according to the invention, each abutment portion, when abutting, forms an angle with said surface in the plane of said doctor blade, which angle is smaller than 15°.

Furthermore, the invention provides a paint scraper for removing coverings, especially paint, from a surface, wherein said paint scraper comprises a scraper according to the above technical features.

Description of drawings

The present invention will be described in detail below by way of example in conjunction with the accompanying drawings for the purpose of illustration, in the accompanying drawings:

Figure 1 is a schematic side view of an embodiment of a doctor blade of the present invention;

Figure 2 is a cross-sectional view of the embodiment of Figure 1; and

Figure 3 is a perspective view of an embodiment of the paint scraper of the present invention.

Detailed ways

Figure 1 shows an embodiment of a doctor blade according to the invention, the two longitudinal edge regions of which are transversely chamfered (see Figure 2), thereby essentially providing two longitudinal scraping edges: A first scraping edge 5 and a second scraping edge 6 opposite the first scraping edge 5 in the region of the lower longitudinal edge of the scraper. The first and second scraping blades 5, 6 of this embodiment are divided into a plurality of abutment portions 7.1, 7.2, 7.3, 8.1, 8.2, which extend transversely to the scraping direction when the abutment performs a scraping action, And furthermore, it is continuous in the plane of each scraper edge 5,6. Each scraping edge 5, 6 is corrugated in the plane of its scraping edge and each abutment portion 7.1, 7.2, 7.3, 8.1, 8.2 is convex in the plane of the scraping edge 5, 6, forming part of the crest of the corrugation. The longitudinal extensions of the abutment portions 7.1, 7.2, 7.3, 8.1, 8.2 lying in the plane of the respective scraping edge 5, 6 have different lengths. Each abutment portion 7.1, 7.2, 7.3, 8.1, 8.2 forms an angle with the surface in the plane of the scraping edge 5, 6 when it abuts against the surface, which angle is always less than 90°, but said angle is preferably less than 30°. °, more preferably less than 15°. The smaller said critical angle, eg smaller than 5°, the less the abutment portion 7.1, 7.2, 7.3, 8.1, 8.2 protrudes from the surface.

FIG. 2 shows a cross-sectional view of the embodiment of FIG. 1 . Said two scraping edges 5 , 6 of the scraper are formed by transversely chamfering the two longitudinal edge regions of the scraper, obtaining a non-right-angled parallelepipedal section.

Naturally, the doctor blade of the present invention also has other embodiments besides the above-mentioned embodiments. An elongated doctor blade can for example be provided with two blades in the region of a longitudinal edge, or the blade itself can have another overall design, but still comprise the unique blade according to the invention. The scraper can, for example, be triangular in shape, which is provided with a scraper edge along all or any one of the triangular edge regions.

FIG. 3 shows a perspective view of an embodiment of the paint scraper according to the invention, which is equipped with the scraper blade of FIGS. 1 and 2 for scraping with one scraper blade 6 .

Claims (8)

1. A scraper for a paint scraper for removing paint from a surface, the scraper comprising at least one scraper edge (5, 6), which is divided into at least two and extends along said scraper edge The abutting portion (7.1, 7.2, 7.3, 8.1, 8.2), the abutting portion extends transversely to the scraping direction when abutting against the scraping action, it is characterized in that each abutting portion (7.1, 7.2, 7.3 , 8.1, 8.2) are raised in the plane of the scraping edge (5, 6), thereby obtaining an effective scraping effect. 2. The scraper according to claim 1, characterized in that each abutment portion (7.1, 7.2, 7.3, 8.1, 8.2) is continuous in the plane of the scraper edge (5, 6) and each abutment The back portion extends continuously along a continuous curve. 3. The scraper according to claim 1 or 2, characterized in that, the scraper blades (5, 6) are wave-shaped in the plane of the scraper blades (5, 6), and each abutment portion (7.1, 7.2 , 7.3, 8.1, 8.2) form part of the peak of the waveform. 4. Doctor blade according to claim 1 or 2, characterized in that the longitudinal extensions of the abutment portions (7.1, 7.2, 7.3, 8.1, 8.2) have different lengths. 5. The scraper according to claim 1 or 2, characterized in that each abutment portion (7.1, 7.2, 7.3, 8.1, 8.2) is in contact with the scraper blade (5, 6) in the plane of the abutment Said surfaces form an angle which is always less than 90°. 6. The scraper according to claim 5, characterized in that each abutment portion (7.1, 7.2, 7.3, 8.1, 8.2) is in contact with the scraper blade (5, 6) in the plane of the abutment The surfaces form an angle which is always less than 30°. 7. The scraper according to claim 5, characterized in that each abutment portion (7.1, 7.2, 7.3, 8.1, 8.2) is in contact with the scraper blade (5, 6) in the plane of the abutment The surfaces form an angle which is less than 15°. 8. A paint scraper for removing paint from a surface, characterized in that the paint scraper comprises a scraper according to any one of claims 1 to 7.

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