Патент USA US2131368код для вставки
Sept. 27,‘ 1938. J. M. BOWEN‘ . , 2,131,368 PROTECTED BLADE' Filed April 27, 1937 E1594‘ / 3/ /3O x3,2 iNVENTOR BY 371.83% Patented Sept. 27, 1938 . moms STATES ATENT OFFICE 2,131,368 PROTECTED BLADE Joseph M. Bowen, West Quincy, Mass, assignor to Gillette Safety Razor Company, Boston, Mass, a corporation of Delaware Application April 2'7, 1937, Serial No. 139,264 5 Claims. (01. 206—46) This invention relates to the packaging'of fine ends may be located centrally and symmetrically edged blades, such for example as safety razor blades. In one aspect it consists in an end notched or recessed blade protected by a wrapper 5 of sheet material and positively held therein against displacement by being interlocked with the wrapper. A protected blade of this general type is disclosed and claimed in my priorappli~ cation, Ser. No. 101,281, ?led September 17, 1936'. or they may be offset toward one edge or the other of the blade according to the design of the blade to be wrapped, and in each' case the I neck orreduced portion of the end tabs of the 5 wrapper will be correspondingly located. An important advantage of the present inven tion is that it may be applied with equal facility to the wrapping of single edged bladesor double 1,0 In another aspect the present invention consists edged blades. in the adaptation of the broad principle of my earlier invention to the wrapping of blades having a recess provided at any point between their end corners. 15 In handling safety razor blades under commer- These and other features of the invention will be best understoodand appreciated‘from the fol lowing description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawing, in which:—I- 15 cial conditions of transportation and distribution Figs. 1, 2 and 3 illustrate successive steps in the and in the morev or less casual treatment of such wrapping of a double edged blade having cen blades by the user, the extremely ?ne, keen edge trally located end recesses; of the blade is likely to become dulled by being g0 7 rought into contact with its wrapping either at 10 Figs. 4, 5 and 6 illustrate similar steps in wrap- , ping a single edged blade having non-symmetri- 20 a fold vertex or by being drawn across or cutting the wrapper in being removed therefrom. On cally located end recesses; Fig. 7 is a fragmentary view in perspective ~ this account the best and most skillful efforts of the manufacturer in sharpening blades are often PD in brought to naught because of the damage done to the fragile and delicate structure of the blade edge after it has been brought to the keenest showing one end of the blade in‘ Figs. 2 and 3 in position upon its wrapper but before the end tab is folded over the end of the blade. ‘ The wrapper blank, which may be made of ' thin sheet material such as oiled or waxed paper possible shaving condition and before the shaving operation is actually undertaken. With these conditions in view an important ob- as shown in Fig. 1, comprises a rectangular body portion iii scored to de?ne side ?aps H and [2 and end tabs or tongues l3. Each end tab I3 ject of the present invention is to provide a novel wrapper in which an end notched blade may be tapers outwardly and is provided, with a reduced I portion or neck Ill and an enlargedv terminal 0 fully enclosed and held positively in such position that its cutting edge is protected at all times from direct contact with the fold vertex lines of the wrapper. I have discovered that the desired results may be accomplished by shaping the end tabs of the wrapper to present a neck or portion of reduced width which may be passed through 40 or into the end cavities of the blade and so-interlocked with the blade that transverse shifting thereof in the wrapper is positively prevented. Then, by folding side flaps of the wrapper on lines outside the sharp edge or edges of the blade, 45 the latter is held positively out of contact with the adjacent fold vertex lines of the wrapper. Preferably and as herein shown the reduced portions or necks in the end tabs carry enlarged ends or terminal portions which are substantially DOTUOYE l5 haVing a sfqllare Cut end edge- In the wrapper of Fig. l the reduced portions 54 are symmetrically located centrally in the tabs l3 and 35 the outer portions l5 are symmetrically shaped and located upon the necks M. The inwardly di rected edges of the portions 55 ?are outwardly or diverge and thus provide deep reentrant in wardly tapering notches in the side edges of the 40 end tabs- The necks M are located entirely outside or beyond the fold lines Of the tabs. The re entrant angles formed at the juncture of the said ?aps 5 l and 52 with the end tabs l3 Supply COH Venient angles for engaging and DOSitiVBIY 1009i?- 45 ing the blanks for the Wrapping Operation. F01‘ example, When the Wrapping is done by automatic machinery gauge pins may be located ‘at these points» to wider than the recesses of the blade. The end tabs are thus shaped for interlocking with the blade in a longitudinal sense and so prevent endwise shifting which might eventually destroy the integrity of the wrapping and permit dulling of 55 the blade. The notches or recesses in the blade As herein shown a safety razorblade 20 of the 50 “AHtOStI‘OD” type is Selected fol‘ illustrative D111‘ poses. These blades have’ oppositely disposed cutting edges and unsharpened end edges in each . of which is formed a deep notch or recess 2| hav ing parallel side edges and bevelled or ?aring out- 55 2 2,131,368 er corners. The blade 20, or a similar blade, may be presented to the wrapper in automatic machin ery by a suction head having nozzles which en gage the blade at spaced points and maintain it in position by suction. The head is operated to carry one blade after another from a stack in a magazine into position in alignment with the suc cessive wrappers which may be presented by a rotary turret or other mechanism. In its pre 10 reentrant, inwardly tapering notches in the sides of the end ?aps. _. In the wrapping operation the blade 46 is presented in alignment with and above the body portion 30 of the wrapper and in such position that the end flaps 33 may be folded beneath the body of the blade while the neck portions 34 are caused to pass into the end recesses of the blade liminary position the blade is suspended above the body of the wrapper H} by substantially the and interlock therewith. As the folding opera 10 tion continues the enlarged terminal portions 35 height of the main portion of the end tabs £3. The body of the wrapper and the side flaps I i and are folded downwardly upon the upper face of the blade 40 thus establishing a longitudinally in terlocking relation between the two. Finally the [2 are held flat or substantially so while the end tabs l3 are turned into upright and substantially parallel position, as indicated in Fig. '7. In this condition the end ?aps may be folded inwardly and the reduced necks l4 passed into the end recesses 2i of the blade and this folding operation continues until the blade 28 is lowered upon the body ll! of the wrapper. The necks 14 pass fully into the recesses 2| and the terminal enlarge blade is completely enclosed by folding the side ~ flap 32 and then the side ?ap 3| as indicated in Fig. 6. Having thus disclosed my invention and de scribed two embodiments thereof for purposes of illustration but not limitation, I claim as new and 20 desire to secure by Letters Patents:— 1. A safety razor blade having recessed ends ments l5 of the end tabs lie ?at upon the upper presenting unsharpened edges, in combination face of the blade. This completes the interlocking engagement of the end ?aps with the blade and it will be seen that the necks I 4 ?t snugly within the with a protecting cover including end tabs folded on a line parallel to said unsharpened edges, the 25 recesses 2! so that lateral shifting of the blade is positively prevented. At the same time the in ner end of the recess 2i is brought into engage ment with the enlarged terminal portions i5 of the flaps so that endwise shifting of the blade in either direction is positively prevented. The wrapping of the blade may now be com pleted by folding the side ?aps I! and I2 inward ly upon their fold vertex lines. As shown in Fig. 3 the ?ap I 2 is ?rst folded and then the flap H is brought down upon it in overlapping relation, completely enclosing the blade, covering the en larged terminal portions [5 of the end ?aps and 40 edges and diverging inner edges which form deep preventing displacement thereof. Accordingly, tabs having reduced necks engaging the sides of the recesses and enlarged end portions wider than said recesses. 2. A safety razor blade having recessed ends, in combination with at protecting cover including 30 end tabs with reduced neck portions ?tting into the end recesses and enlarged terminal portions overlying the blade between the ends of said recesses, and side ?aps covering said terminal portions and the otherwise exposed body of the 35 blade. 3. A protected blade having recessed ends, in combination with a wrapper including a body portion as long as the blade and end tabs folded inwardly over the blade ends on fold lines spaced so long as the side flaps are held in closed position, the blade is positively anchored in its wrapper and held against displacement no matter to what apart by the full length of the blade, the tabs having reentrant notches forming reduced necks usage the protected blade may be subjected. blade and enlarged terminal portions engaged In Figs. 4 and 5 my invention is illustrated as applied to the wrapping of a single-edged blade 40 having end notches located unsymmetrically and closely adjacent to its rear unsharpened edge. In this case the wrapper comprises a rectangular body portion 30 and side ?aps 3i and 32 similar to the corresponding parts of the wrapper shown in Fig. 1. End flaps 33 are also included in the wrapper and each is provided in its outer edge with a reduced portion or neck 34 arranged non symmetrically and offset toward the fold vertex line of the side flap 3|. The necks 34 are thus positioned to register with the end recesses of the blade 40 when the latter is symmetrically located upon the wrapper as shown in Fig. 5. (30 The neck portions 34, as before, terminate in en 50 larged terminal portions 35 having square-cut end which are received within the end recesses of the with the inner edges of said recesses. 4. A protected blade having a wrapper with tabs folded over both ends thereof, the tabs being symmetrically edge-notched above their respec tive fold lines and thus provided with centrally located necks to enter similarly located recesses in the blade ends and having at their free ends enlarged portions wider than the recesses in the blade ends. 5. A protected blade having a wrapper with a tab folded over one end thereof, the tab having an unsymmetrically located neck therein located 55 above its fold line, said tab ?tting within an off set recess in the blade end and having at its free end an enlarged portion wider than the recess of the blade. > JOSEPH M. BOWEN.