FI56783C - FOERFARANDE FOER TILLVERKNING AV TANDPETARE - Google Patents

Description

TUT ^ L.I Γβ1 advertisement publication Γ ^ B 1 utläggningsskrift 56763 5¾¾ C (45) Patent granted 10 j4 1930

Patent Meddelat V ~ '"V (51) Kv.lk.' / Int.CI. * B 27 L 9/00 FINLAND — FINLAND (21) P * tefiuih» kemu * - Patentansölcnlng 702973 (22) H »k # ml * pllvi - Anseknlngsdtg 29 · 09 · 78 ^ ^ (23) Primer - Glltlghettdag 29 · 09 «78 (41) Become Public - Bllvlt offentllg Patent and Registration Office .... ...

'(44) Date of publication and publication.

Patent- och registrerttyrelsen Aruökan utlagd och utl.ikrlften publicerad 31.12.79 (32) (33) (31) Requested privilege — Begird prlorltet (71) (72) Vesa Lauri Ylisaari, Vanhatie 11, 61300 Kurikka, Finland-Finland (Fl) (7 * 0 Oy Kolster Ab (5k) The present invention relates to a method for the production of toothpicks, in particular stick combs, in which a method is applied to wood veneer which is parallel to the causes of the veneer, the toothpicks being substantially V separated. -shaped grooves and the cutter is used to machine bevels tapering the tip portions of the toothpicks, whereby the veneer and the shape milling are moved relative to each other in the transverse direction of the veneer causes.

Toothpicks with a wedge-shaped cross-sectional shape are usually made as integral stick combs comprising several sticks, from which the individual toothpicks can be easily folded off. The tip of the toothpick is bevelled to taper to make it easier to insert the stick into the gap between the teeth.

Finnish patent publication 53 933 discloses a method for manufacturing toothpicks, according to which, in the first step, a plurality of adjacent, corrugated grooves separating the toothpicks are milled from the wooden strip and in the second step a thin surface layer containing the toothpicks is cut. During machining, the milling cutter must be moved 2,56783 wavy towards and away from the wood strip as the wood strip moves past the cutter so that the brushes of the formed stick combs curve and form a sharp tip portion on the finished toothpick.

The disadvantage of such a manufacturing method is that, in addition to the actual rotational movement, the milling cutter has to make a reciprocating, reciprocating movement relative to the wood strip or, correspondingly, the wood strip has to perform such a movement relative to the milling cutter. This requires a relatively complex navigation mechanism. The method is also not suitable for using wood veneer as a toothpick blank. In addition, the bevel of the tip of the toothpicks must always be formed on the brush side of the stick.

Various methods for machining veneer chamfers directly into a toothpick have also been known in the past, but even these methods involve machining the chamfers on the surface of the toothpiece blank on which the toothbrushes are formed in a later machining step.

The object of the present invention is to provide a method which eliminates the above-mentioned drawbacks, and this object is achieved by the method according to the invention, which is mainly characterized in that the chamfers tapering the tooth tips are machined on a veneer surface opposite the tooth brushes.

The toothpicks made by the method according to the invention are characterized in that the oblique required to form the tip part to taper towards the tip is made on the plane surface, i.e. the base side, of the triangular cross-section and not on the brush side, as is the case with conventional toothpicks. The toothpick beveled on the base side has been shown to be less damaging to the gums than the beveled toothpick on the brush side.

The invention will be described in more detail below with reference to the accompanying drawing, in which Fig. 1 is a perspective view of a stick comb made by the method of the invention, Fig. 2 is a perspective view of a single toothpick, Fig. 3 is a schematic plan view of an apparatus for applying the method -IV.

3,56783

Figure 1 shows a stick comb 1 machined into a veneer sheet 2 and comprising a plurality of parallel toothed sticks 3. The lower surface 2a of the veneer sheet is milled with evenly spaced V-grooves k so that the toothpicks form a triangular cross-section. The upper surface 2b of the veneer sheet has a bevelled bevel 5 with a shaped blade so that a tapered tip portion 3a is formed in the toothpicks.

In order to make such stick combs, grooves k parallel to the causes of the veneer are first machined on its other surface in a manner known per se. The veneer sheets 6 cut from the grooved veneer strip are then placed on the moving belt 7 so that the grooved side of the veneer sheets is located towards the belt. The direction of movement of the belt is indicated by reference A and the veneer sheets are positioned perpendicular to the direction of movement for their reasons. Parallel grooves separated by ribs 7a (Fig. K) are formed on the surface of the belt, into which the ridges of the veneer sheet are suitable for firmly fixing the veneer sheets to the belt.

Your rotator is mounted above the belt! two contour milling machines 8, the axes of rotation 9 of which are parallel to the plane of the belt and form an oblique angle with the direction of movement of the belt. The installation and shape of the milling cutters is then such that each milling machine mills into the second edge region of the strip formed by the successive veneer sheets on the belt the oblique 5 The veneer sheets are then split with a circular blade 10 into two finished stick combs 1.

Alternatively, the grooving 4 of the veneer strip or sheets can only be performed after the bevelling 5 has been machined.

The drawing and the related preference are only intended to illustrate the idea of the invention. The details of the method according to the invention can vary considerably within the scope of the claims.