MXPA97006132A - Knives set for hair cutters including a configured knife for the expulsion of the cabe - Google Patents

Abstract

The present invention relates to a blade for use as a stationary blade or a moving blade in a hair clipper provided with a set of blades including a movable blade and a stationary blade, the blade set being constructed and arranged so that the The movable knife is pressed against the stationary knife and allows the movable knife to move reciprocally relative to the stationary knife in a direction transverse to a longitudinal axis of the cutter, said knife being characterized in that it comprises a base portion having an end of tooth, and a mounting end opposite said tooth end, a plurality of teeth disposed in a spaced apart relationship and parallel to each other and projecting from said tooth end, each said tooth having a tip, a root opposite said tip and being attached to said tooth end, said roots being attached to said extr tooth tooth, each of said roots have a wide portion adjacent said tooth end, and tapering from said wide portion toward said mounting end, said roots attached to said tooth end in spaced relation to each other, said separate relationship and said tapering said teeth from said wide portion to said mounting end combining to define generally flat lower surface channels between said roots extending from said tooth end toward said mounting end to facilitate the ejection of hair trimmings from the set of blades and the flow of hair beyond said raic

Description

KNIVES SET FOR HAIR CUTTERS INCLUDING A CONFIGURED BLADE FOR HAIR EXPULSION DESCRIPTIVE MEMORY This mv nciop refers to sets of blades for hair clippers, and more particularly, to sets of cutting blades that include a reciprocating moving cutting blade and a stationary blade on which the moving blade moves reciprocally and where at least One of the blades is provided with a confi rmation that promotes the ejection of cut hair fragments and / or hair from the cutting area of the blade set and facilitates the flow of hair out of the cutting area. Electric hair clippers are known in the art, and generally include a set of blades having a stationary blade and an oval blade 1. Each of the blades has a row of separate teeth arranged so that the strands of hair which enter the teeth of the stationary knife are cut off when the teeth of the movable knife pass through the teeth of the stationary knife. A common disadvantage of conventional hair clippers is that hair clippings generated from the cutting action of the blades accumulate in the cutting area of the blades and become trapped and / or clogged in the blades, or accumulate hair clippings in the cutting area, a process that is exacerbated when cutting wet head, deteriorates the cutting action of the blades. Similarly, the hair of the subject that is still attached to the scalp can also become clogged, entangled or damage the operation of conventional cutting blades. One attempt to solve this problem has been to mill or machine v-shaped grooves between the teeth of the stationary blade. Due to the disadvantages of conventional milling and machining techniques, these grooves tend to act as a funnel and do not provide enough rutes for hair leakage and / or haircuts. In this way, there is a need for a set of blades for a hair clipper that effectively facilitates the ejection of a significant portion of hair and / or hair clippings from the cutting area of the blade set. Another disadvantage of the knife sets is the individual tooth configuration, which is partly due to the limits of the available milling or grinding technology. By design, each tooth has a designated angle of incidence, or the angle of inclination of the tooth side from a relatively broad base or root, towards a relatively narrow upper projection or crown. The advantages of a large angle of incidence or a more gradual inclination gives a sharp lateral edge, which is better for precise cuts. However, due to the narrow thickness of the blades, a larger angle of incidence results in a wider base for the tooth. Such a wider base makes it difficult to feed the hair for the cor-te. In addition, a sharper edge tooth is easily damaged by use and loses the edge more quickly. Finally, and again due to the relatively narrow thickness of the individual teeth, a larger angle of incidence results in a relatively narrow crown. Narrow crowns are easily damaged through normal manufacture and are known to physically disintegrate. or they deteriorate in other ways due to insufficient thickness. In the case of stationary blades, to promote the feeding of hair in the cutting area, it is desired that the tip be thinner than the root, viewed from above, and as such, the root is expected to be thicker. that the tip. In addition, a very thin root means that the angle of incidence can not be very large, for fear of making the crown very thin and weak. In this way, the decision of an angle of incidence designed and specific for a cutting tooth is a compromise of the factors listed above. Nevertheless, due to the limitations of conventional milling and milling technology it is also almost impossible to produce cutting teeth having the desired angle of incidence through a portion of its length close to the cutting area and also at the height of the tooth from the base to the crown. In fact, the angle of incidence of the production teeth commonly varies depending on the point on the tooth where the angle is medium. FTs or as result cutter teeth with less than optimal performance characteristics. Accordingly, a first object of the present invention is to provide an improved blade for a set of hair cutting blades which is designed to prevent the accumulation and binding of hair and / or trimming of hair in the cutting area. , which promotes the ejection of the cuts coming from the cutting area and promotes the flow of the user's remaining hair out of the blades. Another object of the present invention is to provide an improved blade for a set of hair cutter blades having a uniform angle of incidence for at least the length of its length in the cutting area. It is also another object of the present invention to provide an improved set of blades for a hair cutter, in which the teeth of the stationary blade are configured to avoid pinching the skin. Accordingly, the first object of the present invention is to provide a blade for use in a hair clipper provided with a set of blades including a movable blade and a stationary blade, the blade set being constructed and arranged in such a way that the The mobile blade is pressed against the stationary blade to allow the blade to move reciprocally relative to the stationary blade in a direction transverse to a longitudinal axis of the cutter. The blade is further characterized by a base portion having an end of tooth and a mounting end opposite the tooth end and a plurality of teeth arranged in spaced apart relation and parallel to each other and projecting from the tooth surface in a direction parallel to the longitudinal axis of the cutter; each tooth has a tip, an opposite root < the tip and being attached to the end of the tooth, the roots attached to the end of the tooth in spaced relation to each other to define lower-plane surface channels generally between the roots to facilitate the ejection of the hair clippings from the set of blades and the flow of hair beyond the roots. A second object of the present invention is to provide a blade for use in a hair clipper provided with a set of blades including a mobile blade and a stationary blade, the blade set being constructed and arranged in such a way that the blade The moving blade is pressed against the stationary blade to allow the blade to move reciprocally relative to the stationary blade in a direction transverse to a longitudinal axis of the cutter, the blade being characterized by a base portion having an end of tooth and a mounting end opposite the end of the tooth, a plurality of teeth arranged in spaced-apart relation and parallel to one another and projecting from the tooth extrusion in a direction parallel to the longitudinal ee of the cutter, the base portion has a portion of constant radius that begins at the tooth extrusion to define a transverse hump to facilitate the expulsion and / or flow of hair and / or hair clippings off the end of the tooth. A third object of the present invention is to provide a blade for use in a hair clipper provided with a set of blades including a movable blade and a stationary blade, the blade set being constructed and arranged in such a way that the blade The moving blade is pressed against the stationary blade to allow the movable blade to reciprocate relative to the stationary blade in a direction transverse to a longitudinal axis of the cutter, the blade being characterized by a base portion having a tooth end and a mounting end opposite the end of the tooth, a plurality of teeth arranged in spaced apart relation and parallel to each other and projecting from the end of the tooth in a direction parallel to the longitudinal axis of the cutter, each tooth has a tip, an opposite root at the tip and being attached to the end of the tooth, and each tooth has an angle of incidence you at least in a cutting area close to the tooth extr-emo.

The above objects are satisfied or overcome by means of the present set of blades for a hair cutter, in which the teeth of the blade are arranged on the base of the blade to facilitate the passage of hair and / or cuts of hair outside the cutting area. Each tooth has a root that is disposed on the blade in r-ation separated from the adjacent teeth by means of a generally flat channel. This channel defines a space through which hair and / or hair clippings can flow more freely than in the previous stationary blade configurations. In addition, each tooth is provided with rear grooves that define additionally the flared flat channel and promote the passage of hair and / or hair clippings out of the cut area so that the blades do not get stuck with hair. Similarly, each tooth has a uniform angle of incidence along its length in the cutting area, as well as along a desired portion (ie its height). Another feature of the present set of blades is that blade has teeth that have a full radius except for the edges of the cutting blade to avoid pinching or tearing the skin.More specifically, a blade is provided for use in a hair clipper having a set of blades that includes a moving blade and a stationary blade, the set of blades being constructed and arranged in such a way that the movable blade is pressed against the stationary blade to allow the moving blade 1 to move eciprocally relative to the stationary blade in a direction transverse to a longitudinal axis The cutter includes a base portion that has a tooth end and a mounting end opposite the end of the tooth, a plurality of teeth disposed in a spaced relationship and parallel to one another and projecting from the end of the tooth in a direction parallel to the longitudinal axis of the cutter, each tooth has a point, a root opposite the point and being attached to the end of the tooth. knife. The roots are attached to the end of the blade in relation to one another to define generally open channels or flat bottom surface between the roots to facilitate the expulsion of the hair and / or hair clippings that come from a cutting area of the game of blades and the flow of hair beyond the roots. The present blade set is also characterized by a base with a constant radius or transverse hump portion and a tooth configuration inclined over at least the stationary blade to further facilitate ejection of hair clippings. The aforementioned characteristics of the invention, as well as others and the manner of obtaining them, will become apparent and the invention itself will be better understood with reference to the following description of an embodiment of the invention taken in conjunction with the accompanying drawings, in which: which: Figure 1 is a vertical sectional view of a hair clipper of the type suitable for the adaptation of the present set of blades; Figure 2 is a bottom plan view of a prior art stationary knife of a set of cutter blades; Figure 2fi is a cross section taken along line A-A of Figure 2 and in the generally indicated direction; Figure 2B is a cross section taken along the line B-B of Figure 2 and in the general direction indicated; Figure 3 is a side elevational view of the blade of Figure 2; Figure 4 is a bottom plan view of the stationary blade of the present blade set; Figure 4A is a sectional view taken along line 0-A of Figure 4; Figure 5 is a top-fragmented plan view of the stationary blade of Figure 3; Fig. 6 is an enlarged internal fragmentary plan view of the blade shown in Fig. 3; Figure 7 is an elongated fragmentary top plan view of the stationary blade of Figure 3; Figure 8 is a top plan view of the present stationary blade; Figure 3 is a side elevational view of the blade of Figure 8, Figure 10 is a sectional view taken along line 10-10 of Figure 4 and in the generally indicated direction; is a bottom plan view of an alternative embodiment of the present cutter-to-cutter blade, and Figure 12 is a top plan view of a moving blade that is suitable for use with the present set of blades. Figure 1, an electric hair clipper, generally designated 10 includes a case 12, a motor 14, and a set of blades generally designated 16. electricity is supplied through an energy supply 18 such as an on-line voltage, batteries or the like. Blade set 16 includes a mobile blade and a stationary knife 22. The movable knife 20 is pressed against the stationary knife 22 by means of a tension spring 24, which allows the cutting knife 22 moves back and forth in an alternating motion in a direction transverse to a longitudinal e of the cutter. The movement of the movable knife is carried out by an eccentric cam 25 which is also coupled to the motor 14. A first set of teeth 28 is provided in the mobile knife 20 and a second set of teeth 30 is provided in the stationary knife. 22. A lower side 32 of the male blade 20 moves alternately in a slidable manner relative to an upper surface 34 of the stationary blade 22 to define a cutting area 36 wherein the hair trapped between the blades is sheared by the action of the moving blade in relation to the stationary blade, and the shearing action of the complementary teeth, as is well known in the art. The stationary blade 22 has on its lower side 38 a location for the head of at least one threaded fastener 40 which is used to secure a spring retaining clip 42 to the upper surface 34 and thus hold the tension spring 24 to the stationary blade. In this manner, the knuckle blade 20 is retained to the stationary blade 22 to create the present set of blades 16, which is detachably retained on the cutter 10 in a snap-fit arrangement to allow replacement and cleaning of the blade. knife. Referring now to Figures 2 and 3, a stationary blade of the prior art generally designated 44, also has an upper side 34 and a lower side 38 as does the blade 22. A linear row of teeth 4b includes a plurality of relatively large teeth. short 48, each tooth located between a pair of relatively longer teeth 50 to create what is known in the art as a jumping tooth blade. Jumping tooth blades are typically used to cut the hair of pets, and the wider space between the adjacent longer teeth 50 allows the thicker hair of the animal to be led more easily to the cutting area 36. The blade 44 it is typically manufactured from a piece of steel using several stamping and / or machining steps that are well known in the art. More specifically, the blade 44 includes a base portion 52 having a tooth end 54 provided with the teeth 46 and a mounting end 56 opposite the end of the tooth. At least one and preferably two mounting apertures 58 are disposed in the base portion 52 at the mounting end 56 and are each directed to accommodate a fastener 40. The blade 44 t Lenes a pair of exterior edges 00 and the plurality of longer teeth 50 includes a pair of outer end teeth 62 each of which is located adjacent one of the corresponding outer edges G0 and each of the teeth 62 has a transverse thickness that is thicker than a corresponding thickness of the remaining long teeth. Each tooth 48, 50 has a tip 64, 66 and a root 68, 70 respectively, the roots being located opposite the tips and being the point at which the tooth engages the base portion 52. In the blade 44 of the prior art, it is evident that both the shorter teeth 48 and the longer teeth 50 are generally thicker in the roots 68, 70 than in the tips 64, 66. Another common feature of such teeth 46 is that the longer teeth 50 have tips 66. which are thinner transversely and more lanceolate when viewed laterally (as best seen in figure 3) to pass more easily through the hair and lead the hair to the area of cor + e 36. A first attempt by facilitating the ejection of hair clippings from the area of the cut 36 is clearly seen in figure 2. At the roots 68, 70 of the teeth 46 is located a V-shaped groove 72 extending from the end 54 of the tooth towards back ends 74 of the teeth 46. During the manufacture of the blade 44, the slots 72 are typically crooked by means of machining. It has been found in practice that this type of groove is not satisfactory for the ejection of hair clippings from the cutting area 36. As such, the cutting area is easily jammed, which requires the operator to take time to clean the blades very frequently. Referring now to Figures 2A and 2B, cross sections of the teeth 46 are illustrated at two points. Each tooth has an angle of incidence R which is a measure of the inclination of the tooth from its base 73 towards its crown 75. A disadvantage of the cutter blades of the prior art such as the blade 44 is that the angle of incidence R It varies through a portion of the length of the tooth near the cutting area 36. This variation, which is the result of conventional grinding, machining and milling technology, alters the performance of the blade and deviates from the parameters of design for blades. It will be noted that the angle R in Figure 2ñ is smaller than the angle R 'in Figure 2B. Likewise, the portion of the tooth in Figure 2B has a wider base 73 relative to its crown 75 compared to the portion of the tooth in Figure 20. The relatively narrower cor-on 75 in Figure 2B will be more prone to damage or structural deterioration during manufacture that the crown 75 in Figure 2A. Among other things, this disparity in the angle of incidence will result in a condition in which the portion of the blade represented by FIG. 2A will be less sharp than that of FIG. 2B. Referring now to Figures 4-7, the blade of the present invention will be discussed in greater detail. It will be noted that the stationary blade 22 is described incorporating the features described below. However, it is contemplated that these features can also be incorporated into the movable blade 20. The blade 22 is specifically designed to overcome the disadvantages of the blade 44 in the prior art which relate to the problem of ejecting hair clippings from the cutting area 36. Generally speaking, many of the features that will be described later are made possible by the manufacture of the blade 22 by means of injection molding, instead of the above machining techniques. Although injection molding is commonly associated with plastics, of which the present blade 22 can be made, it is contemplated that the blade 22 be made of injection molded metal. Since the blade 22 shares many basic elements with the blade 44, the shared elements will be designated with identical reference numbers. As such, the blade 22 includes a base portion 52 having a tooth end 54, a mounting end 56 opposite the end of the tooth, and therefore one and preferably two mounting openings 58. A pair of outer edges 60 It is also on the blade 22. In the total configuration of the tooth, the blade 22 also shares a basic similarity with the blade 44, however, one of the features of the present blade 22 is that the teeth 30 have been reconfigured to maximize hair ejection and / or clippings. of hair from the cutting area 36 and also to minimize the pulling or pinching of the skin, the latter being somewhat frequent with the prior art cutters. In the present blade 22, the teeth 30, which also each have a base 73 and a corrugation 75, include a plurality of short teeth 76 and a plurality of long teeth 78 that are disposed on the blade in a ratio of Parallel and separate jumping tooth, with each of the short teeth having one of the long teeth on each side. The teeth 76 and 78 project from the end 54 of the tooth in a direction parallel to the longitudinal ee of the cutter 10. Each of the short and long teeth 76, 78 has a corresponding tip 80, 82, as well as a corresponding root 84. , 86. Like the blade 44, the teeth 76, 78 also have a rear end. "A main characteristic of the present blade 22 is that the roots 84, 86 are attached to the end 54 of the tooth in spaced relation to each other to define * a plurality of channels 88 of generally planar lower surface between the roots to facilitate ejection of the hair clippings from the set of teeth. blades 16. Referring now to blades 4 and 6, it will be noted that the root 84, 36 of each tooth 76, 78 is inclined along the length of the tooth from a wide portion 90 adjacent the edge of the extr-emo 54 of the tooth. tooth towards the tips 80, 82 relatively narrower. Similarly, each root 84, 86 is also tilted from the wide portion 90 to the mounting extrusion 56. This latter inclination also opens or widens the channels 88 towards the mounting end 56 to facilitate ejection of the cuttings. of hair from the cutting area 36. As best seen in FIG. 4, at the front of the line L, there is no contact between the teeth 28 of the movable knife and the teeth 30 of the stationary knife. As a result, the tips 80 and 82 located beyond the line L are generally straight to promote feeding the hair within the cutting area 36. Towards the back of the line L, the teeth 76, 78 are provided with the configuration The aforementioned inclined shape for further facilitating hair feeding in the cutting area 36. Referring now to FIGS. 4, 6, 9 and 10, another feature of the present blade 22 is that each tooth 7b, 78 is provided with rear grooves in the form of a rib 92 dependently upright (when the LO cutter is in use) extending from the rear ends 74 of each of the teeth in a direction toward the mounting end 56. It is contemplated that the degree The rear grooves may vary with the application, however, in the preferred embodiment, the rear grooves extend substantially along the entire length of the base portion 52 toward a line. line defined by perimeters 93 of the mounting openings 58. In addition, each of the rear rib ribs 92 is mated with the crown 75 of the corresponding tooth 30, and has a radius along its upper edge 94 to reduce the pull or tearing the skin of the individual whose hair is being cut. The rear grooves 92 further define the channels 88 and further facilitate the ejection of hair and / or cut-outs from the cutting area 36.

Yet another feature of the present blade 22 is that the Sides of the teeth 76, 78 have a constant angle of incidence R "(best observed in Figure 4A), along a portion of their length (from the tips 80, 8"to the roots 84, 86) in the cutting area 36. The angle of incidence R" is measured in the base 73 of the teeth in the wide portion 90 near the cutting area 36. It will be seen in Figure 4A that the angled portion extends only about 1/3 upward from the height of the teeth 76. This is because if the angle R "were maintained across the height of the tooth 76, a relatively narrow and sharp crown 75 would be defined. The type of tooth configuration is undesirable due to the tendency of the sharp crowns to be easily damaged or structurally deteriorated during manufacture In the present blade 22, a tooth configuration is obtained in which the size of the angle of incidence R "is ind dependent on the thickness of the tooth. In tooth 76 as shown in Figure 4A, the width or thickness of the crown 75 is greater than it would be if the angle of incidence R "were maintained towards the crown. It has a much better incidence compared to normal teeth, but it still maintains an adequate crown width In one modality, the incidence angle is 9o, however other angles are contemplated, depending on the application. a gradual opening of the channels 88 in a front facing dimensionBy adapting the profile of the tooth, the blade 22 also defines a wider or open space in a vertical direction outside the cutting area 36. Whenever the blade 22 is disposed on the cutter 10 so that the teeth 76, 78 face towards below, this configuration causes the hair and / or haircuts to fall out of the cutting area 36. Referring now to Figure 4, at the outer edges 60 of the blade 22, one of the outer end teeth 96 is located adjacent to one of the corresponding outer edges, and each of the outer teeth has a transverse thickness that is thicker than a corresponding thickness of the other long tooth 78. This thickness- is designed to provide protection, par- ticularly impact protection, to the teeth located between the outer tooth. In the present blade 22, each of the end teeth 96 defines a shoulder shoulder region 98 with the corresponding edge 60 that provides the desired impact protection and further minimizes weight. Referring now to FIGS. 9 and 10, it will be noted that the base portion 52 of the blade 22 has a par-ed thickness T extending from the mounting end 56 toward the end 54 of the tooth. In the preferred embodiment, the base portion 52 has an area of constant radius that begins at the end 54 of the tooth to define a transverse hump 100. It is preferred that, due to considerations in injection molding, the thickness T remain uni orme along the base portion, including in the constant radius or hump LOO portion. An advantage of the hump 100 is that it promotes a smooth transverse flow action of the hair that is cut and, acting together with the channels 88, further facilitates the ejection of hair clippings that are from the cutting area 36. Fn Preferred embodiment, the transverse hump 100 is disposed on the blade 22 near the end 54 of the tooth that the mounting end 56. The flat bottom surface channels 88 are substantially equally spaced from one another when measured at the hump. Naturally, it is contemplated that the position and shape of the hump 100 may be altered or even eliminated depending on the application of the blade 22. However, when a jump tooth blade 22 is used to cut animal hair, the presence of the hump 100 will avoid the clogging caused by the accumulation of animal fat. Referring now to Figures 8-10, another feature of the blade 22 is that the tips 80, 82, as well as the crown 75, the upper rear ribs 94 and all the other edges of the tooth 76, 78 with the exception of the edges of cutting, they have a radius that minimizes any javelination or tearing of the skin or scalp that is cut, which occurred with the sets of blades of the prior art. In addition, a leading edge 102 of each of the long teeth 78 has a curved configuration when viewed from the side (as it becomes ill in FIG. 9) to facilitate movement of the blade set 16 through the hair. Referring now to Figure 11, an alternate embodiment of the blade 22 of Figure 4 is shown and is generally designated 104. The main difference between the blade 104 and the blade 22 described above is that the blade 104 has no configuration. of the jumping tooth as that of the blade 22. Instead, all the teeth 30 have the same length. This type of blade is typically used to cut human hair and not animal hair. All the other components and features of the blade 22 are present in the blade 104 and they have been assigned the same reference numbers i. Referring now to Figure 12, the blade I? IÓVLI suitable for use with the present fixed blade 22 is shown in greater detail. A knife-like edge surface 106 separates each of the teeth 28 from the movable knife and the edges are oriented in the direction of movement of the movable knife 20. A feature of the edges 106 is that they are capable of cutting some of the strands of hair entering between the teeth of the stationary knife 30. The spacing between the adjacent teeth 28 is greater than the space between the adjacent stationary teeth 30. The teeth 28 have flat tips 108 and are separated by the knife-like cutting surfaces. 106. Borders 106 are ".}.? oriented in the direction A in which the movable knife moves reciprocally and are sharp enough to cut a hair with a slicing action created by the movable knife, although the knife edge of a razor is not needed. Generally, knife edge surfaces 106 cut strands of hair as they would be cut with a knife using a slicing action, and teeth 28 cut with a shearing action similar to a conventional hair clipper. It is contemplated that in some cases the teeth 28 only partially cut some strands of hair. It is also contemplated that the present stationary blade 22 may be used with a conventional moving blade having a plurality of teeth without the sharp edge surfaces 106, as is well known in the art. During use, the hair clipper 10 is used in a normal manner. The long teeth 78 with their straight-sided tips and diamond-shaped portions close to the cutting area 36 (when viewed from above, as in FIG. 6) help to feed hair into the cutting area, where the shearing action of the movable knife 20 in relation to the stationary knife 22 generates haircuts. A combination of features, including the flat bottom surface channels 88, the rear ribs 92 and the LOO transverse hump create a structure where clutter or collection of hair clippings is avoided, and instead hair clippings they are easily ejected from the cutting area 36. Furthermore, when the blade set 16 is equipped with a movable blade 20 having the sharpened edge surfaces 106, the cutter 10 can be moved in a direction that allows the knife-like surfaces 106. cut some strands of hair, while movable teeth 28 cut other strands of hair. The angle of approach towards the strands affects the cutting speed by the moving blade. However, the teeth 28 do not cut the strands of hair in exactly the same way as the edges 42, which creates a new and unique style of haircut with machine similar * in appearance to the style obtained with a razor for shaving. Other styles are also contemplated. Although a particular embodiment * of the set of blades for hair clipper of the invention has been described, it would be appreciated by those skilled in the art that changes and modifications may be made thereto without departing from the invention in its broader aspects and as it is stable in the following claims.

Claims (20)

NOVELTY OF THE INVENTION CLAIMS

1. - A blade for use in a hair clipper (10) provided with a set of blades (16) including a moving blade (20) and a stationary blade (22), the set of blades (16) is constructed and arranged for that the movable knife (20) be pressed against the stationary knife (22) and allow the moving knife to move reciprocally relative to the stationary knife in a transverse direction toward the longitudinal axis of the cutter, said knife being characterized by: a baee portion (52) having a tooth end (54), and a mounting end (56) opposite said tooth end (54); a plurality of teeth (28, 30, 76, 78) arranged in a spaced apart relationship and parallel to one another and projecting from said tooth end (54) in a direction parallel to the longitudinal axis of the cutter (10); each mentioned tooth (30) has a tip (80, 82), a root (84, 86) opposite said tip and being attached to said tooth end (54); said roots (84, 86) attached to said tooth end (54) in spaced relation to each other to define generally flat lower surface channels (88) between said roots to facilitate ejection of hair clippings from the set of blades (16). ) and hair flow beyond said roots (84, 86). 2.- The blade in accordance with the claim 1, further characterized in that said base portion (52) has a transverse portion of constant radius (100) starting at said tooth end (54). 3.- The blade in accordance with the claim 2, further characterized in that said blade portion (52) has a wall thickness (T), and said thickness remains uniform along said blade portion (52), said constant radius portion (100). 4. The blade according to claim 1, further characterized in that said blade is configured to be the stationary blade (22) of the blade set (16). 5.- The blade in accordance with the claim 1, further characterized in that each of said teeth (76, 78) has rear ridges (92, 94). 6. The blade according to claim 5, further characterized in that said rear grooves (92, 94) extend at least substantially towards said mounting end (56) of said blade. 7. The blade according to claim 1, further characterized in that said teeth (76, 78) have a constant angle of incidence (R) close to a cutting area (36). 8. The blade according to claim 1, further characterized in that said plurality of teeth include a plurality of long teeth (78) and a plurality of short teeth (76), said pluralities of short and long teeth are disposed on said blade in a style of jagged teeth wherein each of said short teeth (76) has one of said long teeth (78) on each side thereof. 9. The blade according to claim 1, further characterized in that said base portion (52) has a pair of outer edges (60), and said plurality of teeth includes a pair of outer end teeth (96), one of which are located adjacent one of said corresponding outer edges (60) of said base portion (52), said end teeth (96) each having a transverse thickness that is thicker than a corresponding thickness of the remaining teeth, and wherein said end teeth (96) each define a shoulder shoulder region (98) with said corresponding edge (60). 10. The blade according to claim 1, further characterized in that all the edges of said teeth have a radius except for the cutting edges thereof. 11. The blade according to claim 1, further characterized in that roots (84, 86) of said teeth are configured so that the lower flat surface channels (88) are widened in the direction of said mounting extrusion (56). 1

2. The blade in accordance with claim i, further characterized in that each of said teeth has rear grooves (92, 94) extending towards said mounting end (56), said rear grooves (92, 94) of each tooth define said flat bottom surface channels (88) between said root (84, 86) and said mounting end (56). 1

3. A blade for use in a hair clipper (10) provided with a set of blades (16) including a moving blade (20) and a stationary blade (22), the blade set (16) is constructed and arranged so that the movable knife (20) is pressed against the stationary knife (22) and allows the movable knife to move reciprocally relative to the stationary knife in a transverse direction towards a longitudinal ee of the cutter, said knife characterized by: a base portion (52) having a tooth end (54), and a mounting end (56) opposite said tooth end (54); a plurality of teeth (28, 30, 76, 78) arranged in a spaced apart relationship and parallel to one another and projecting from said tooth end (54) in a direction parallel to the longitudinal axis of the cutter (10); said base portion (52) has a constant radius portion beginning at said tooth end (54) to define a transverse hump (100) to facilitate the expulsion and / or flow of the hair and / or hair clippings off the end of the tooth (54).1

4. - The blade according to claim 13, further characterized in that said blade is configured to be the stationary blade (22) of the blade set (16). 15.- The blade in accordance with the claim 13, further characterized in that said teeth (76, 78) have a constant angle of incidence (R) in a portion of the teeth in a cutting area (36). 16. The blade according to claim 13, further characterized in that each of said teeth (76, 78) has a tip (80, 82), a root (84, 86) opposite said tip (80, 82). and being attached to said tooth end (54), said roots (84, 86) being attached to said tooth end (54) in spaced relation to each other to define generally flat lower surface channels (88) therebetween. 17. A blade for use in a hair cutter (10) comes with a set of blades (16) including a moving blade (28) and a stationary blade (30), the set of blades (16) is constructed and arranged so that the movable knife (28) is pressed against the stationary knife (30) and allows the movable knife to move reciprocally relative to the stationary knife in a direction transverse to a longitudinal axis of the cutter, said knife being characterized by : a base portion (52) having a tooth end (54), and a mounting end (56) opposite said tooth end (54); a plurality of teeth (28, 30,) arranged in a spaced apart relationship and parallel to one another and projecting from said tooth end (54) in a direction parallel to the longitudinal axis of the cutter (10); each tooth (48, 50) has a tip (64, 66), a root (68, 70) opposite said tip and being attached to said tooth end (54); and each tooth (48, 50) has a constant angle of incidence (R) in at least one cutting area (36) close to said tooth end (54). 18.- The blade in accordance with the claim 17, further characterized in that the size of said angle of incidence (R) of said tooth is independent of said thickness (T) of said tooth (76). 19. The blade according to claim 17, further characterized in that said tooth end (54) has a constant radius portion defining a transverse hump (100) to facilitate ejection of hair clippings from said tooth end ( 54). 20. The blade according to claim 17, further characterized in that said angle of incidence (R) extends upwards at least a portion of said tooth from a base (73) towards a crown (75). SUMMARY OF THE INVENTION A blade is provided for use in a hair clipper (10) having a set of blades (16) including a moving blade (20) and a stationary blade (22), the blade set (16) is constructed and arranged so that the movable knife (20) is pressed against the stationary knife (22) and allow the movable knife to move reciprocally relative to the stationary knife in a direction transverse to a longitudinal axis of the cutter; the blade includes a base portion (52) having a tooth end (54), and a mounting end (56) opposite the tooth end (54), a plurality of teeth (28, 30) arranged in a separate relationship and parallel to one another and projecting from the tooth end (54), each tooth has a tip (80, 82) and a root (84,86) opposite the tip and being attached to the tooth end (54); the roots (84, 86) are attached to the tooth end (54) in spaced apart relation to define generally flat bottom surface channels (88) between the roots to facilitate the expulsion of the hair and / or hair clippings from a cutting area (36) of the blade set (16); likewise, the teeth have a constant incidence angle (R) at least from the tip (80, 82) towards the root (84, 86) and the base portion (52) defines a transverse hump area (100). ) of constant radius designed to further facilitate the expulsion of hair and / or haircuts from the cutting area (36). JN / rnmm * blrn * fac P97-822