IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0140032
(2016-04-27)
|
등록번호 |
US-9604754
(2017-03-28)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
8 |
초록
▼
A hermetically-sealing opening dispensing lid made of injected plastic material for foodstuff packages of solid, dry, powdered or grain products is made up of a movable body hinged to a frame by means of a hinge, the frame is secured to the package by perimeter ridges and ultrasonic welding or by an
A hermetically-sealing opening dispensing lid made of injected plastic material for foodstuff packages of solid, dry, powdered or grain products is made up of a movable body hinged to a frame by means of a hinge, the frame is secured to the package by perimeter ridges and ultrasonic welding or by an edge which goes through the wall of the package and joins an inner counter frame, the movable body is made up of two lateral walls with retaining elements which act on tabs placed at the top of the frame, a front wall with a hinged gripping flange, an upper bridge and a lower bridge, the lid is provided with racks spaced from the lateral walls which cooperate with a second pair of tabs, and the bridge may contain a set of parallel ribs preventing the products from going through the movement zones.
대표청구항
▼
1. A hermetically-sealing opening dispensing lid made of injected plastic material for a foodstuff package for holding solid, dry powdered or grain products, said lid comprising: a frame which is secured to the package, with the package including an opening, and the frame secured at the opening to f
1. A hermetically-sealing opening dispensing lid made of injected plastic material for a foodstuff package for holding solid, dry powdered or grain products, said lid comprising: a frame which is secured to the package, with the package including an opening, and the frame secured at the opening to form a window; a movable body hinged at an edge of the frame by a hinge formed of a weakening of a join between said frame and said movable body, which permits pivoting movement of the movable body about the hinge for opening and closing through the window of the frame, said movable body including: two lateral walls with a first radius of curvature at upper edges of the lateral walls and a second smaller radius of curvature at lower edges of the lateral walls,a closing front wall andtwo joining bridges, including a lower joining bridge which joins bottoms of the lateral walls together, and an upper joining bridge which joins tops of the lateral walls together at rear portions thereof;wherein the upper bridge has two parts, a front part closer to the closing front wall, and a rear part further from the closing front wall, the rear part having approximately a constant radius of curvature, and the front part one of: has a decreasing radius of curvature andis in a decreasing plane;wherein the frame is provided with an outer perimeter edge except for a zone in which the hinge is located, in geometrical concordance with an outer edge of the closing front wall of the movable body, so that in a closing position, said closing front wall and said outer edge are flush;wherein the frame is provided with a pair of first tabs facing downwards, one at each side of the lower part of an upper side of the frame, acting as an arrangement of retention in concordance with the upper edge of the lateral walls of the movable body, and said first tabs are located in a cutaway portion of the frame and being joined to a top of the cutaway portion;retaining elements placed in front and rear zones of the movable body;a gripping/pulling flange placed in an outer face of the front wall;wherein the upper bridge of the movable body is provided with ribs/elevations having an upper edge provided with a toothed area/rack, said ribs/elevations being placed in parallel with the lateral walls and located at some distance from said respective lateral walls;wherein the frame is in turn provided with second tabs which interact with the upper teeth of said ribs/elevations. 2. A dispensing lid, according to claim 1, wherein the toothed area of the upper edge of the ribs/elevations has a progressive radius of curvature from a front part thereof in which a corresponding said tab comes into contact with the upper edge of the toothed area to a fully open position, in which the tab is inserted approximately as far as half-way down the height of a tooth of the toothed area. 3. A dispensing lid, according to claim 1, wherein an upper rear end of the lateral walls of the movable body has an elevation in which the radius of curvature increases, so that said elevation comes into contact with the first tabs when the lid is in a position close to a full opening position thereof, thus limiting the capacity for movement and deformation of the movable body and improving the stability of the lid in the open position. 4. A dispensing lid, according to claim 1, wherein the upper bridge, seen in cross-section, has at least certain lateral zones located between each of the ribs/elevations forming the racks and the corresponding lateral wall, in which the radius of curvature in respect of the hinge of the lid is constant. 5. A dispensing lid, according to claim 4, wherein the upper surface of a front of the upper bridge is provided with a set of parallel ribs forming a comb, with a radius of curvature at a top in respect of the hinging axis of the lid being substantially identical to the radius of curvature of a rear of said upper bridge, and in that a front edge of the upper bridge with the set of ribs has a concave curve. 6. A dispensing lid, according to claim 5, wherein in an open position, the distance between the frame and a rear of the upper bridge is from 0.2 to 1.5 mm. 7. A dispensing lid, according to claim 3, wherein the upper bridge has a constant curve in respect of the hinge, and a lower surface provided with a set of parallel ribs forming a comb, said comb constituting a decreasing portion of said front part, and in that a front edge of the upper bridge with the set of ribs has a concave curve. 8. A dispensing lid, according to claim 1, wherein the tabs are from 2.5 to 3.5 mm high and 2.2 to 3.2 mm wide and their thickness is between 0.3 mm and 0.7 mm. 9. A dispensing lid, according to claim 1, wherein the frame comprises different outward-facing cutaways in a zone of the tabs, so as to allow said tabs to become laterally flush with a corresponding plane of the lateral walls of the movable body, said cutaway leaving a space of between 0.1 to 1.0 mm between the tab and the frame. 10. A dispensing lid, according to claim 1, wherein the frame is provided, at a rear face thereof facing towards the package, with at least one perimeter ridge, with a triangular section, whose vertex forms an acute angle, and which can be joined with an outer surface of the package by ultrasonic welding, in which the acute angle has a value of between 40° and 100° and the height of the triangular section is between 0.1 and 0.5 mm. 11. A dispensing lid, according to claim 1, wherein a rear face of the frame facing towards the package is provided with a perimeter edge adjacent to the window formed by said frame, covering roughly half of the width of sides of the frame, the height of said edge being approximately equal to that of a thickness of the package, and an outer shape of said edge being substantially identical to that of the window made in the package in which this has to be placed, and in that the frame also comprises a counter frame made of a piece of plastic material forming an interior window substantially identical to that of the frame and having sides with at least the same thickness as that of sides of the frame and which can be sealed both to the edge of the frame and to an interior surface of the package in which this has to be placed. 12. A dispensing lid, according to claim 1, wherein a rear edge of the upper bridge comprises at least a stop with a triangular section with a vertex which faces upwards, with a vertical front side and oblique rear side, in which said stop projects towards a rear of the movable body for part of its section, so that in a fully open position the rear edge of the movable body becomes flush with an interior surface of the package. 13. A dispensing lid, according to claim 12, wherein the at least one stop comprises more than one stop spaced along the length of the rear edge of the upper bridge. 14. A dispensing lid, according to claim 1, wherein lower angles of the frame, and lower angles formed by the lower bridge and the lateral walls, are rounded. 15. A dispensing lid, according to claim 14, wherein the rounded angles have a radius of from 0.5 mm to 6 mm. 16. A dispensing lid, according to claim 1, wherein a closing zone between the frame and the closing front wall, at least at one of: a rear of the front wall, anda front surface of the frame, is provided with a sealing joint, said sealing joint being formed as a single piece with at least one of: the front wall andthe frame and injected with a softer material than the material of said lid and said frame. 17. A dispensing lid, according to claim 16, wherein the sealing joints are: one of identical and different,one of smooth and rough andone of flat and provided with at least one perimeter ridge. 18. A dispensing lid, according to claim 1, wherein the closing front wall is substantially flat, and is provided on an outer face thereof with a slight thickening located on an inner perimeter at a certain distance from the outer edge, extending at a bottom thereof to a lower hinging edge leaving a smooth perimeter portion at lateral and upper edges. 19. A dispensing lid, according to claim 1, wherein the lid comprises a seal, in which said airtight seal covers the whole of opening joining zones between the front wall and the frame, and extends as far as the surface of the package on which this is placed. 20. A dispensing lid, according to claim 19, wherein the seal is in a shape substantially identical to that of an outer edge of the frame although the seal extends at a bottom thereof beyond the edge of the hinge, so that said seal covers said hinge in surrounding relation and reaches a portion of a plane of the package, with fixed sealing at said outer edge and on the plane of the package at the bottom. 21. A dispensing lid, according to claim 1, wherein the seal is provided with at least one flap located in at least one corner, left loosely projecting and not adhering to the front wall. 22. A dispensing lid, according to claim 1, wherein an outer surface of the front wall of the movable body is provided with a gripping flange, said gripping flange being hinged at one edge thereof in respect of said front wall, and the hinge is determined by a weakening of material at a joining zone between the front wall and the gripping flange, said gripping flange being adapted to adopt a folded position, in parallel to the lid to which the gripping flange is joined, and an unfolded, gripping position. 23. A dispensing lid, according to claim 22, wherein the joining zone occupies only a central part of the hinging edge and the lid is provided with a recess in a perimeter thickening at said joining zone where the hinge is housed. 24. A dispensing lid, according to claim 22, wherein an end opposite to the hinging end has an outward curve so that an edge of said end is slightly separated from the surface of the front wall when the flange is in the folded position. 25. A dispensing lid, according to claim 22, wherein the gripping flange is provided with at least one window and an outer surface of the front wall of the movable body is provided with hook-shaped lugs, which are inserted in and engage with said windows in the folded position, and insertion and withdrawal in the folding and opening phases respectively takes place against elastic deformation of the plastic material used for injecting the lid, and with this the lugs. 26. A dispensing lid, according to claim 22, wherein a surface of the gripping flange, located on an outside in the folded position, is rough, and in that a surface opposite to the rough surface is smooth. 27. A dispensing lid, according to claim 1, wherein the frame is provided with an extension with at least one valve which allow injection of inert gas and extraction of air from inside the package.
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