FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
COMPLETE SPECIFICATION
[See Section 10, Rule 10]
Title :"A Complete System Shaving Razor Assembly"
Laser Shaving (India) Pvt. Ltd.
Having its office at
5th Floor, Malhotra House,
Opp. G.P.O., Fort,
Mumbai 400 001, Maharashtra, India

FIELD OF THE INVENTION.
The present invention relates to wet system shaving razors and cartridges and particularly complete system razor assembly.
More particularly the present invention relates to shaving cartridges that provide for controlled swivel morion and easy loaded and unloaded from a handle.
BACKGROUND OF THE INVENTION
In India majority of low income consumers use one piece or three piece standard double edge safety razors for shaving. These razors manufactured to load one standard disposable double edged blade. The blade is replaced by new one when the blade cutting edge becomes blunt. The conventional double edge safety razor designed such that the blade held rigidly between cap member and guard member at fixed position with respect to handle that is the orientation of cutting edge of blade with respect to handle and skin being shaved is fixed. Orientation of blade cutting edge with respect to skin area being shaved is also vital. The gap between blade cutting edge and guard member is also found more. The conventional safely razors with above features may be available at affordable price but user tends to experience discomfort, cuts and sometimes bleeding too due to above said reasons. Continuing efforts are being made to overcome above said problems and to improve shaving performance and thereafter some of designs are commercialized e.g. fixed cartridge twin blade shaving systems, swivel cartridge twin blade /triple blade/five blade shaving systems etc. particularly swivel cartridge shaving systems razors wherein cartridge swivels on contour of a skin being shaved giving comfortable shaves, but they are expensive due to complexity of construction e.g. pusher, spring, pins, assembly activity etc.

SUMMARY OF THE INVENTION
The aim of present invention is to make plastic molded razor handle 1 of single part comprising cam member 21, 22, clamp member 23, 24 and on which at least single blade 6 disposable cartridge 3 swivels on the skin being shaved. Accordingly disposable blade cartridge 3 comprising cap part 5 blade member 6 and seat part 4 and adapted to be fitted to a molded razor handle 2. The seat part 4 has clamp slot 52, 53 for holding razor handle clamp member 23,24 and spring member 41,42 for exerting a force on razor handle cam member 21,22. The object of the invention feature on pushing of cartridge holding portion of handle between tapered surface of projection 48,49 clamp member 23,24 on handle brought closer together and adapted clamp member23,24 get locked with clamp slot 52,53 of seat for holding the disposable cartridge 3.
Another object of the invention feature on compress of cartridge holding portion 2B clamp member23, 24 brought closer together and take out handle 2 from shaving cartridge 3 to replace with new one.
Still another object of the invention feature there is a controlled swivel movement of shaving cartridge 3 over system shaving handle 2 and hence the seat is provided with two parallel reversely raised projections called spring member 41, 42, spring member 41,42 is in engagement with cam member 21, 22 provided on either side of the cartridge holding portion 2B of handle 2.
Yet another object of the invention feature there is an elaborated guard portion on seat part 4 in front of cutting edge of blade 6 to prepare the skin for comfortable and safety shaving, also behind blade cutting edge there are grooves on the cap part 5 to reduce the irritation during shaving.
According to the present invention there is provided a complete system razor assembly 1 includes system razor handle 2 and a disposable shaving cartridge assembly 3 engaged with razor handle 2 having hand holding portion 2A and cartridge holding portion 2B, the disposable cartridge assembly 3 and system razor handle 2 are interconnected such that cartridge assembly 3 will swivel/rotate on the handle 2 with cam members 21, 22/spring member 41/42 biasing neutral position, the handle holding portion 2A is provided with serrations for gripping purpose, and some land may left for incorporating logo, if necessary, the cartridge holding portion 2B is mainly meant for holding and

controlled swiveling of cartridge 3 to more closely follow the contours of surface being shaved, the disposable shaving cartridge assembly comprising substantially rigid seat part 4, a cap part 5, and blade part 6, blade is held rigidly between seat part 4 and cap part 5 by means of riveting process, the seat part 4 and cap part are of two individual moldings.
A seat part 4, a blade 6 and a cap part 5, the seat part 4 provided with two parallel reversely raised projections called spring member 41,42.
A seat part 4 has further two clamp slots 52, 53 on either side of spring member 41,42.
Substantially a cap part 5 has longitudinal grooves 52 parallel to blade 6 cutting edge to reduce friction behind blade 6 cutting edge.
The Said disposable shaving cartridge includes elongated guard portion 47 in front blade 6 cutting edge to protect the skin being shaved from nicks/cuts in addition to preparing beard for efficient shave during shaving operation.
A seat part 4 further integrally molded with two projections 48, 49 having tapered surfaces 50, 51 to easily locate and to inserting shaving handle 2 into cartridge assembly 3.
A seat part 4 has guide member 43, 44 creates axis of rotation, therefore, to facilitate the shaving cartridge 3 to swivel on the shaving handle 2 during shave. Blade 6 is placed between parallel planes of seat part 4 and cap part 5 and riveted firmly and ensuring guide member 43,44 clamp slots 52, 53 are made arranged away from blade 6.
Guide member 43,44 clamp slots 52, 53 are incorporated in the middle of shaving cartridge which facilitates easy loading on handle and easy disposal of used cartridge.
Shaving razor handle 2 mainly comprise two areas viz. handle holding potion 2A and shaving cartridge holding portion 2B, the cartridge holding portion 2B possessing cup shaped clamp members 23, 24 on both ends and two cam members 21, 22 on either side of middle slot.

Clamp members 23,24 enters into clamp slots 52,53 of seat part 4 on pushing of handle on tapered surface 50, 51 of seat part 4 to engage the cartridge upon releasing of clamp members 23, 24 by the operator, the clamps remain locked in the inwardly-flexed position when it is desired to remove a used blade cartridge, the operator need to compress the cartridge holding portion 2B for removing clamp members 23,24 from clamp slots 52, 53 and hence removing cartridge.
On loading the cartridge on handle cam member 21, 22 engage with both the spring members 41, 42. The cam member 21, 22 and spring member 41, 42 cooperatively urge the cartridge to be in a predetermined /neutral position, relative to handle longitudinal axis.
During shaving when shaving cartridge tend to rotate towards clock wise direction, one of spring member 41, 42 get disengaged with its relative cam member 21, 22 , the other spring member continue in exerting force on its relative cam member to resiliently support the shaving cartridge.
In handle holding portion 2 A, cartridge holding portion 2B,cam member 21, 22 and clamp members 23, 24 are all preferably injection molded integrally in a single part.
BRIEF DESCREPTION OF THE DRAWINGS
Fig. 1 is an isometric view of a razor assembly.
Fig.2 is an exploded isometric view of a razor assembly.
Fig .3 is a plan view of disposable cartridge according to the invention.
Fig. 4 is an isometric view of a disposable cartridge showing guide details and
spring members according to invention.
Fig. 5 is an isometric view of disposable cartridge and handle according to the
invention.
Fig. 6 is an isometric view of handle showing the details of cam members.
Fig .7 is pictorial view of disposable cartridge showing its neutral position with
respect to handle.
Fig .8 is pictorial view of disposable cartridge showing its extreme position with
respect to handle when it rotates through clockwise direction during shaving.
Fig .9 is pictorial view of disposable cartridge showing its extreme position with
respect to handle when it rotates through anti-clockwise direction during
shaving.

DETAILED DESCRIPTION OF THE INVENTION
Till today conventional disposable double edge style blade occupy majority of men shaving market due to its low cost factor. During recent fast urbanization in India consumer expecting low cost system razors provided with most recent features e.g. comfort shave, controlled swivel movement of cartridges, easy loading and unloading of cartridge into handle etc.
Unlike prior art pivoting shaving implements available in market wherein plunger operated with complex construction of razor handle moves to and fro when cam member of cartridge exerts force upon it during shaving.
The proposed invention incorporated cam members 21, 22 in the molded handle itself as integrated member to exert force upon the integrally molded spring members 41, 42 of seat 4 thereby avoiding complex construction of plunger mechanism and decreasing cost of razor.
Referring to Fig. 1, it will be seen that illustrative complete razor assembly 1 includes system razor handle 2 and a disposable shaving cartridge assembly 3 engaged with razor handle 2 having hand holding portion 2A and cartridge holding portion 2B. The disposable cartridge assembly 3 and system razor handle 2 are interconnected such that cartridge assembly 3 will swivel/rotate on the handle 2 with cam members 21, 22/spring member 41/42 biasing neutral position. The handle holding portion 2A is provided with serrations for gripping purpose, and some land may left for incorporating logo, if necessary, the cartridge holding portion 2B is mainly meant for holding and controlled swiveling of cartridge 3 to more closely follow the contours of surface being shaved. The disposable shaving cartridge assembly comprising substantially rigid seat part 4, a cap part 5, and blade part 6, blade is held rigidly between seat part 4 and cap part 5 by means of riveting process. The seat part 4 and cap part are of two individual moldings.
Referring to fig.2 it will be seen that illustrative system razor handle 2 and disposable razor blade cartridge assembly 3 includes a seat part 4, cap part 5 and blade part 6. The cap part 5 has pips 51 which are extended through openings 61 of blade 6 and through holes 46 of seat 4 and riveted to together firmly. The seat part 4 may be provided openings 45 through which debris may pass out.

Seat part 4 provided with integrally molded spring members 41, 42 generally transverse to an axis parallel to the blade edge with oppositely inclined surface. The object of spring member 41, 42 is to resiliently support disposable shaving cartridge assembly 3 during shaving for comfortable shaving. In neutral position both spring members 41, 42 are in engagement with both cam member of 21, 22 of handle 2.
During shaving, while clockwise swiveling of shaving cartridge assembly 3 over the skin one of spring member 41, 42 in engagement with corresponding cam member to resiliently support the shaving cartridge assembly 3, and urge the other spring member disengaged from its respective cam member 21, 22.
Similarly during anti-clockwise movement of shaving cartridge one of spring member 41, 42 in engagement with corresponding cam member to resiliently support the shaving cartridge assembly 3, and urge the other spring member disengaged with its respective cam member 21,22.
While neutral position of shaving cartridge assembly 3 both spring member 41, 42 exert pressure on both cam member of 21, 22 of razor handle 2 to force the shaving cartridge to its predetermined swivel position in relation with handle 2.
The cam members 21, 22 are molded integrally in front of the cartridge holding portion 2B of the system razor handle 2. The cam members 21, 22 are made with enough strong structure for repeated usage of system razor handle 2.The cam member 21, 22 are made in such a way that loading of cartridge and removing of cartridge from the handle is made easy.
Referring to fig.3 a plan view and front view of disposable shaving cartridge assembly 3 according to the invention is shown. In accordance with the present invention there is provided a safety razor cartridge assembly comprising a seat part 4 a cap part 5 and a blade 6 with sharpened edges placed between seat part 4 and cap part 5 and then secured together firmly by means of riveting process. In general, single blade shaver i.e. conventional double edge style razor blade edge has more positive protrusion to obtain closer shave, but this leads to nicks and cuts on skin, to our knowledge, this is due to less area of guard portion in front of blade cutting edge and therefore the proposed invention is provided with elongated guard portion 47 of 3mm to 7mm width (o g b) and to height of (o g h) 2mm to 5mm to well prepare beard and to protect the skin from nicks/cuts. The guard portion 47 width (o g b) is measured along the blade sitting surface from cutting edge of blade to end of guard. The guard portion

height is (o g h) is 2mm to 5mm measured parallel to blade sitting surface from blade cutting edge to end of guard portion top surface. The guard portion may have 3 to 6 longitudinal grooves/projections in front of the blade cutting edge to prepare beard for smooth shaving.
The disposable shaving cartridge assembly 3 comprising seat part 4, cap part 5 and blade 6 disposed between seat part 4 and cap part 5 to secure firmly together by means of riveting. The cap member behind cutting edge of blade provided with 4 to 6 longitudinal grooves placed parallel to blade cutting edge to reduce friction between skin being shaved and cap part surface to improve shaving comfort.
Referring to fig. 4, there is shown a perspective view of disposable shaving cartridge assembly 3 according to the invention. According to this invention, shaving cartridge assembly may be removable and pivotally mounted to a razor handle as when required hence it is desirable to establish the guiding and holding system to create interrelationship between disposable shaving cartridge 3 and system shaving handle 2, hence, opposite face of blade sitting surface of the seat part 4 is provided with two projections 48, 49 having tapered surface 50, 51 in addition to shaft shaped guide members 43,44, above which there are arc shaped clamp slot 52,53 as apart of holding system.
The minimum opening distance between tapered surfaces 50, 51 at apexes should be more than the maximum distance of handle clamps 23, 24 hence the clamp 23, 24 may be disposed between tapered surface 50,51 then slides into clamp slot 52,53 while pushing the handle against walls of tapered surface 50, 51 for loading the disposable shaving cartridge. Once the shaving cartridge loaded into handle, it facilitates swivel movement of the shaving cartridge assembly 3 on the razor handle 2. It is known that shaving efficiency of shaving cartridge may be improved if the shaving cartridge is adapted to swivel on the handle, as the cartridge to more closely follow the surface of the skin being shaved.
Once the shaving cartridge mounted upon the handle, the cam members 21, 22 receives bias force exerting from spring member 41, 42 on the handle to establish predetermined position between cartridges and handle in relation with handle longitudinal axis as shown in fig 7.

Referring to fig. 5, there is shown a perspective view of disposable shaving cartridge assembly 3 and system razor handle 2 according to the invention.
In general, any swivel razor handle comprising several parts such as plunger, spring, clamps, one or more handle parts etc and manufacturing technologies viz press tooling, injection molding, assembly of parts etc involves in manufacturing of the razor handle.
According to the new invention, eliminating all these complex process, the system razor handle 2 comprising of mainly handle holding portion 2 A, and cartridge holding portion 2B, the handle holding portion may be provided with serration for gripping purpose, the handle 2 cartridge holding portion 2B comprising of cup shaped clamp member 23, 24 and cam member 21, 22, all above said details includes handle holding portion 2A, cartridge holding portion 2B, clamp member 23, 24 and cam members 21, 22 are of integrally injection molded in single piece with high/medium impact polystyrene, or, acrylonitrile butadiene styrene.
Compress the handle at cartridge holding portion to remove clamp member 23, 24 from clamp slots 52, 53 to detach shaving cartridge 3 from system razor handle 2.
Referring to fig.6, there is shown a perspective view of system razor handle 2 according to the invention. The system razor handle 2 comprise handle holding portion 2A, cartridge holding portion 2B, cam member 21,22 and clamp member 23, 24 and injection molded in a single piece with high impact/medium impact polystyrene or acrylonitrile butadiene styrene. Cam members 21, 22 are made with enough strong structure subjected to constant force exerted by spring member 41, 42 for repeated usage of system razor handle 2. During neutral position of cartridge as shown in fig 7 mounted on the handle, both cam member 21, 22 of shaving cartridge 3 engages the spring member 41, 42 in the seat part 4 in response to biasing force generated by spring member 41, 42 therefore the shaving cartridge remain kept in predetermined position in relation with razor handle longitudinal axis.
The handle cartridge holding portion 2B is provided with clamp member 23, 24 located on either side of handle extending outwardly and they collapse on compression of holding portion 2B of handle 2.

The razor cartridge assembly 3 is attached to the razor handle 2 by inserting clamp members simultaneously into the clamp slots 52, 53 of the seat part 4.
Referring to fig. 7, there is shown a view of system razor handle 2 with shaving cartridge 3 according to the invention. On absence of external force on the blade the shaving cartridge assembly 3 comprise both spring member 41, 42 exert pressure on both cam member of 21, 22 of razor handle 2 to force the shaving cartridge to its predetermined swivel position in relation to handle 2 longitudinal axis. The angle formed between blade sitting plane to handle longitudinal axis is nearly 62 degrees, here we called neutral angle.
Referring to fig.8, and fig.9, there is shown a view of system razor handle 2 with shaving cartridge 3 according to the invention. As the shaving cartridge is adapted to swivel on the razor handle during shaving process, permitting the shaving cartridge assembly to more closely follow the contours of skin being shaved, the shaving cartridge tend to rotate clockwise direction or anticlockwise direction or remain neutral position, the maximum angle of rotation of shaving cartridge towards clockwise direction, measured between blade sitting plane to handle longitudinal axis is nearly 72 degrees and anticlockwise rotation is nearly 38 degrees.

WE CLAM:
1. A complete system shaving razor assembly (1) includes system razor handle (2) and a disposable shaving cartridge assembly (3) engaged with razor handle (2) having hand holding portion (2A) and cartridge holding portion (2B), the disposable cartridge assembly (3) and system razor handle 2 are interconnected such mat cartridge assembly (3) will swivel/rotate on the handle (2) with cam members (21,22), spring member (41,42) biasing neutral position, the handle holding portion (21) is provided with serrations for gripping purpose, and some land may left for incorporating logo, if necessary, the cartridge holding portion (2B) is mainly meant for holding and controlled swiveling of cartridge 3 to more closely follow the contours of surface being shaved, the disposable shaving cartridge assembly comprising substantially rigid seat part (4), a cap part (5), and blade part (6), blade is held rigidly between seat part (4) and cap part (5) by means of riveting process, the seat part (4) and cap part are of two individual moldings.
2. A complete system shaving razor assembly as claimed in claim 1, wherein a seat part (4), a blade (6) and a cap part (5), the seat part (4) provided with two parallel reversely raised projections called spring member (41,42).
3. A complete system shaving razor assembly as claimed in claims 1 or 2,
wherein a seat part (4) has further two clamp slots (52,53) on either side of
spring member (41,42).
4. A complete system shaving razor assembly as claimed in claims 1, 2 and 3, wherein substantially a cap part (5) has longitudinal grooves (52) parallel to blade 6 cutting edge to reduce friction behind blade 6 cutting edge.
5. A complete system shaving razor assembly as claimed in claims 1,2,3 & 4 wherein said disposable shaving cartridge includes elongated guard portion (47) in front blade (6) cutting edge to protect the skin being shaved from nicks/cuts in addition to preparing beard for efficient shave during shaving operation.
6. A complete system shaving razor assembly as claimed in claims 1,2,3,4 and 5, wherein seat part 4 further integrally molded with two projections (48,49) having tapered surfaces (50,51) to easily locate and to inserting shaving handle (2) into cartridge assembly (3).

7. A complete system shaving razor assembly as claimed in claim 1, wherein comprising seat part 4 has guide member (43,44) creates axis of rotation, therefore, to facilitate the shaving cartridge (3) to swivel on the shaving handle (2) during shave.
8. A complete system shaving razor assembly as claimed in claims 1, wherein blade 6 is placed between parallel planes of seat part (4) and cap part (5) and riveted firmly and ensuring guide member (43,44) clamp slots (52,53) are made arranged away from blade 6.
9. A complete system shaving razor assembly as claimed in any one of claims 1 to 8, wherein guide member (43,44) clamp slots (52, 53) are incorporated in the middle of shaving cartridge which facilitates easy loading on handle and easy disposal of used cartridge.
10. A complete system shaving razor assembly as claimed in claims 1, wherein shaving razor handle 2 mainly comprise two areas viz. handle holding potion 2A and shaving cartridge holding portion 2B, the cartridge holding portion 2B possessing cup shaped clamp members (23,24) on both ends and two cam members (21,22) on either side of middle slot.
11. A complete system shaving razor assembly as claimed in claims 1 and 10, wherein clamp members (23,24) enters into clamp slots (52,53) of seat part 4 on pushing of handle on tapered surface (50,51) of seat part 4 to engage the cartridge upon releasing of clamp members (23,24) by the operator, the clamps remain locked in the inwardly-flexed position when it is desired to remove a used blade cartridge, the operator need to compress the cartridge holding portion 2B for removing clamp members (23,24) from clamp slots (52,53) and hence removing cartridge.
12. A complete system shaving razor assembly as claimed in claims 10 and 11, wherein on loading the cartridge on handle cam member (21,22) engage with both the spring members 41, 42. The cam member (21,22) and spring member (41,42) cooperatively urge the cartridge to be in a predetermined /neutral position, relative to handle longitudinal axis.

13. A complete system shaving razor assembly as claimed in claims 10 to 12, wherein during shaving when shaving cartridge tend to rotate towards clock wise direction, one of spring member (41,42) get disengaged with its relative cam member (21,22) the other spring member continue in exerting force on its relative cam member to resiliency support the shaving cartridge.
14. A complete system shaving razor assembly as claimed in any one claims 1 to 13, wherein in handle holding portion 2A, cartridge holding portion 2B,cam member (21,22) and clamp members (23,24) are all preferably injection molded integrally in a single part.