METERING

Abstract: A metering cap fitted over a squeeze bottle and capable of pouring liquid in the bottle in a desired quantity into the metering chamber of the cap by squeezing the trunk of the bottle. The metering cap (1) comprises a cap body (3), an inner plug (4), and a pouring pipe (5), and the cap body is integrally composed of a wall (6) to be fitted on the bottle neck, a top wall (15) provided with a peripheral wall (7) defining a metering chamber (9) and a spout, and an upper cap (8) having a plug to close the spout. The inner plug is provided with a flowing-out pipe (21) and outer wall (22) to be fitted in the outer peripheral wall of the metering chamber, and has such a structure that the pipe (21) is connected to the wall (22) with a bottom wall (23) of the metering chamber, in which the inner plug is inserted into the cap body from below and the pouring pipe (5) is fitted into the lower end of the flowing-out pipe (21), whereby a metering cap is assembled.

Description: (Industrial Field of the Invention) The present invention concerns a measuring cap having a measuring chamber, and in further detail, a measuring cap of a squeezable bottle capable of extracting the inner liquid into the chamber by squeezing the body of the bottle. (Background Art) Heretofore, as a measuring cap for measuring and extracting a liquid contained in a squeezable bottle, there have been known the following three types: (a) having an inner plug containing a measuring cup, the inner plug is attached to the bottle neck and the opening of the plug is closed by a screw cap (for example, Japanese Patent Publication Sho 63-44630 and Japanese Utility Model Publication Sho 63-35973), (b) a step is formed to a bottle neck and an inner plug constituting the bottom of a measuring chamber is fit to the step to constitute a measuring cup by the bottle neck per se and a cap is screw coupled to the opening of the bottle (for example, Japanese Utility Model Laid-Open Sho 61-99568) (c) a measuring chamber is constituted by fitting an inner plug to a cap main body, in which an over flow port of the inner plug connected with a supply pipe is opened or closed by a button and the pouring mouth of the measuring chamber is left open (for example, Japanese Patent Publication Sho 47-4790). In both conventional types (a) and (b) described above, since the upper portion of the measuring chamber is entirely opened to form a pouring mouth, the pouring mouth is inevitably enlarged making discharge difficult and liquid draining poor tending to cause dripping. Further, in the said type (a), since the outer circumference of the measuring is in three or two layers because of the overlap of the circumferential wall of the bottle neck, side wall of the measuring cap and the side wall of the cap and since it is situated to the inner side of the wall formed with threads, it is difficult to externally observe the state of the inner liquid discharged to the measuring chamber even if they are made of transparent material. Thus, if it is intended to extract a smaller volume than the constant volume, it is only possible to control the squeezing of the bottle by a hunch and a liquid of a volume less than the constant volume can not easily be extracted by measuring. Further, since the wall portions are overlapped, the material cost is increased by so much. Further, the said type (b) has a drawback that the shape of the bottle neck is complicated and the capping step after charging the inner liquid needs two steps, i.e., a step of exactly fitting an inner plug having a disc constituting the bottom wall of the measuring chamber to a deep position of the bottle neck in a tightly sealed state and a step of screw-coupling the cap making it complicated thus reducing the efficiency extremely in the capping step. Further, if the measuring chamber is left open as in type (c), liquid remaining after use in the measuring chamber may coagulate or it may spill when the bottle falls over. Further, since the bottom wall of the measuring chamber is flat in the conventional type, even if the inside of the measuring chamber can be observed visually from the outside, it is difficult to discharge a small volume of liquid under observation. Furthermore, in a case where the cap is adapted to be attached by screwing, it has a drawback that the cap has to be removed upon very use and also making it impossible to conduct one-touch operation. (Disclosure of the Invention) The object of the present invention is to overcome the foregoing drawbacks in the conventional measuring cap, and in further detail, to provide a measuring cap of which the inside of the measuring chamber can he observed from outside, capable of measuring and extracting an optional volume of liquid by one touch, and enables easy discharge, reducing remaining liquid and dripping. Another object of the present invention is to provide a measuring cap which is easily capped to the bottle, and capable of reducing manufacturing cost. Further object of the present invention is to provide a measuring cap of which the pouring mouth can be opened and closed by one touch. These objects can be attained by the measuring cap according to claim 1. Concerning this measuring cap, the number of parts is reduced and assembling and handling upon use of the cap main body can be facilitated by integrally molding an upper cap for closing the pouring mouth of the cap main body with the cap main body while connecting by means of a spring hinge near the top of the circumferential wall of the measuring of the cap main body. Further, more exact extraction of a small volume is enabled by slanting the bottom wall of the measuring chamber outwardly and downwardly between the discharging pipe and the engaging outer wall. Further, extraction is facilitated by forming the pouring mouth at a position displaced from the center. Furthermore, the liquid is prevented from splashing to the outside even when the squeezing is applied while leaving the upper cap left open by forming the liquid discharging aperture of the discharging pipe slit-width near the closed top of the discharging pipe and forming a direction aligning means for engaging the inner plug to the cap main body such that the liquid discharging aperture of the inner plug is displaced from the direction of the pouring mouth of the cap. The above constituted measuring cap enables constant volume extraction by squeezing the bottle, thus the inner liquid is forced through the supply pipe into the measuring chamber, and when the liquid in the measuring chamber reaches a height at the liquid exit of the discharging pipe, since a volume of the liquid in excess of this returns into the bottle when the bottle restores its original shape, the liquid is stored in the measuring chamber by the volume upto the lower end of the opening of the liquid exit. Then, in the measuring cap of the present invention, since the measuring chamber is made of single wall and the cap main body is made of transparent material, a liquid of a volume less than the above-mentioned constant volume can be extracted under measurement by applying squeezing while observing, from the outside, the volume of the liquid flowing into the measuring chamber and the liquid of a desired volume can always be extracted. In addition, since the bottom wall of the measuring chamber is slanted, the liquid in a small volume is gathered to the circumference of the bottom wall thereby enabling easy observation even for a small volume of liquid making it possible to exactly extract a small volume. Then, since the measuring cap of the present invention has a simple structure which facilitates the assembling of the cap and capping to the bottle, and furthermore the circumferential walls of the liquid measuring chamber do not overlap, some amount of material to be used is saved, thus capable of reducing cost. Furthermore, since the measuring chamber can be completely sealed, the liquid remaining in the chamber after use does not coagulate, nor does the remaining liquid spill out of the chamber when the bottle falls down. Then, to extract the liquid from the measuring chamber, the upper cap can be opened by one touch and the liquid can be extracted simply. In this case, since the pouring mouth is displaced from the center and situated near the circumferential wall of the measuring chamber, extraction is easy and can be conducted with less volume of liquid remaining after extraction. Further, upon assembling the measuring cap, the inner plug is set such that the direction aligning means formed on the circumferential wall of the measuring chamber and the engaging outer wall of the inner plug fit the liquid exit of the discharging pipe at an angle deviated from the direction of the pouring mouth, thereby enabling to prevent the inner liquid from splashing out of the pouring mouth even when the bottle is strongly squeezed. Since the inner plug constituting the bottom wall of the measuring chamber is so adapted to engage from the bottom of the cap main body, it is not necessary to open the entire top of the cap main body and it has become possible to mold the pouring mouth smaller which makes the pouring out of the liquid easier. (Brief Description of the Drawings) The drawings show one embodiment of a measuring cap according to the present invention, in which; Fig. 1 is a front elevational cross sectional view of a cap main body, Fig. 2 is a front elevational cross sectional view of an inner plug, Fig. 3 is a plan view thereof and Fig. 4 is a front elevational cross sectional view in which the the cap main body is engaged with a bottle. (The Best Preferred Mode to Operate the Present Invention) The best mode of the invention is shown specifically in Fig.1 to Fig.4. A measuring cap (1) according to the present invention comprises a cap main body (3), an inner plug (4) and supply pipe (5). The cap main body (3) is integrally constituted with a bottle neck engaging wall (6) formed with threads for screw-coupling with a bottle neck (30), a circumferential wall (7) for a measuring chamber constituting the circumferential wall of the measuring chamber, a top wall (15) for a measuring chamber formed with a pouring mouth (16), and a cap (8) connected by way of a spring binge to the top of the measuring chamber and having a bung for closing a pouring mouth of the measuring chamber. A plurality of ratchet fingers (12) are formed below threads (10) on the bottle neck engaging wall (6) for meshing with a ratchet (31) formed to the bottle neck. The circumferential wall (7) for the measuring chamber has a cylindrical shape having a top and slightly tapered above the bottle neck engaging portion and has a pressfitting portion (14) for the inner plug at the lower portion thereof. The inner plug engaging portion (14) is formed with a protrusion (13) as a direction aligning means for aligning the direction of the inner plug (4), so that it engages a positioning recess (26) of the inner plug to align the direction of the liquid discharging aperture of the inner plug. Further, a pouring mouth (16) is formed at the top wall (15) of the measuring being displaced from the center for facilitating the discharge of liquid and reducing the volume of remaining liquid. Accordingly, the pouring mouth is made smaller to facilitate discharge as compared with the conventional case in which the top of the measuring chamber is entirely opened to constitute a pouring mouth. Further, as shown in the drawing, the pouring mouth (16) has an outwardly extended tapered wall (17) and a ring-like protrusion (18) is formed therebelow such that the bung of the cap is tightly engaged therewith. This makes the bung to engage more reliably to the pouring mouth and attain tight sealing, improve the liquid draining upon discharge and prevent dripping. The upper cap (8) is hinged at three points near the top of the measuring chamber (9) and an annular bung (20) is formed on the inner surface of the cap for engaging the pouring mouth. The inner plug (4) has a discharging pipe (21) at the central portion and an engaging outer wall (22) at the outer circumference for engaging the circumferential wall of the measuring chamber, and the discharging pipe (21) and the engaging outer wall (22) are connected by means of a bottom wall (23) of the measuring chamber slanted outwardly and downwardly. The top of the discharging pipe (21) is closed and a groove of a predetermined length is cut vertically from the top to form a liquid discharging aperture (25). Further, a direction aligning recess (26) for aligning the direction of the inner plug is formed to the engaging outer wall (22), so that the liquid discharging aperture (25) is situated in the direction being deviated by 90° from the direction of the pouring mouth (16), and it engages the direction aligning protrusion (13) formed to the circumferential wall of the measuring chamber. The lower portion of the discharging pipe (21) is extended downwardly from the bottom wall (23) to constitute a supply pipe engaging portion (27) for engaging to hold the supply pipe (5). The measuring cap in this embodiment has been constituted as described above and the measuring cap is assembled by engaging the supply pipe (5) of a length reaching the bottom of the bottle to the inner plug (4), engaging the inner plug (4) to the cap main body (3), so that the circumferential wall (7) of the measuring chamber of the cap main body and the measuring chamber bottom wall (23) of the inner plug constitute the measuring chamber. The inner plug (4) is set such that the direction aligning protrusion (13) formed to the circumferential wall of the measuring chamber engages the direction aligning recess (26) formed to the engaging circumferential wall (22) of the inner plug, so that the liquid discharge aperture (25) of the discharging pipe is engaged at an angle deviated by 90° with respect to the pouring mouth (16) to prevent the inner liquid from splashing to the pouring mouth when the bottle (2) is strongly squeezed. When the measuring cap (1) previously assembled in this way is screw-coupled with the neck (30) of the bottle (2) charged with the liquid till it engages a thread stopper (32) and turns no more, capping can be attained simply in a state where the pouring mouth 16 is always situated in a specific direction. Then, the ratchet fingers (12) of the measuring cap main body mesh with the ratchet (31) at the bottle neck in this state to each other to attain antislackening of threads, by which the cap main body is firmly fixed to the bottle neck. Upon use, by squeezing the bottle (2), the inner liquid flows out through the supply pipe (5) into the measuring chamber (9). When the liquid in the measuring chamber reaches the height at the liquid discharging aperture (25) of the discharging pipe (21), since the volume of liquid exceeding this returns into the bottle when the bottle restores its original shape, the liquid is stored in the measuring chamber by a volume upto the lower end of the opening of the liquid discharging aperture to enable constant volume discharging. In addition, by applying squeezing while observing the volume of liquid in the measuring chamber from the outside, the liquid in a volume less than the predetermined constant volume can be measured and discharged, so that a desired volume of liquid can always be discharged. Then, the liquid can be discharged from the measuring chamber in one touch by opening the hinge cap and tilting the bottle. If graduations for measurement are disposed appropriately on the circumferential wall of the measuring chamber, more exact measuring and extraction are enabled. Although the present invention has been illustrated with reference to a preferred embodiment as described above, the present invention is not limited to the above mentioned embodiment but various design modifications are possible. For instance, the upper cap for closing the pouring mouth of the cap main body may be disposed as a member separate from the cap main body. In a case where it is integrated, the hinge may be a hinge of a usual connection member instead of the spring hinge. Further, it is also possible to form a pouring mouth at the center of the cap and make the bottom wall of the measuring chamber horizontal. Further, the liquid discharging aperture of the discharging pipe can be formed by merely opening the top end. Furthermore, as the direction aligning means for engaging the inner plug to the cap main body, it is possible to form a recess at the upper end of the circumferential wall of the inner plug and a ridge or a protrusion may be formed to the circumferential wall of the measuring chamber for engaging said recess from above. (Industrial Applicability) The present invention may be utilized preferably as caps for squeezable bottles which extract the inner fluid in small portions by attaching it onto restorable bottles such as plastic bottles filled with liquids such as liquid detergents and shampoos.

Claims: A measuring cap (1) comprising: a) a cap main body (3) comprising a bottle neck engaging wall (6) and a measuring chamber (9), said cap main body being made of a transparent material; said measuring chamber (9) comprising a circumferential wall (7) and a top wall (15), said top wall comprising a pouring mouth (16); b) an upper cap (8) for closing said pouring mouth (16); c) an inner plug (4) comprising a discharging pipe (21), an engaging outer wall (22) for engaging said circumferential wall (7) of said measuring chamber (9) and a bottom wall (23) connecting said discharging pipe and said engaging outer wall, said engaging outer wall engaging the inner lower end of said circumferential wall of said measuring chamber to achieve a tightly closed measuring chamber defined by said circumferential wall, said bottom wall and said top wall (15); said discharging pipe (21) further including a liquid discharging aperture (25) at or near the top portion of said discharging pipe, the lower portion of said discharging pipe having a supply pipe engaging portion (27) for engaging a supply pipe (5), characterized in that said liquid discharging aperture (25) of said inner plug is deviated from the direction of said pouring mouth (16) of said measuring chamber (9), and said discharging pipe (21) is closed at the top and formed with a slit near the top to constitute a liquid discharging aperture (25). A measuring cap (1) according to claim 1 characterized in that said measuring cap further comprises a direction aligning means (13) which is formed between said circumferential wall (7) of the measuring chamber and the engaging outer wall (22) of the inner plug (4) for engaging said inner plug to said cap main body (3) such that said liquid discharging aperture (25) of said inner plug is deviated from the direction of said pouring mouth (16) of said measuring chamber (9). A measuring cap (1) according to claim 1 characterized in that said upper cap (8) has a bung (20) engaging said pouring mouth (16) and is integrally moulded with said cap main body (3) while being connected by means of a hinge near the top of said circumferential wall of said measuring chamber(9). A measuring cap (1) according to claim 2 characterized in that said hinge is a spring hinge. A measuring cap (1) according to any of the preceding claims characterized in that said bottom wall (23) of said measuring chamber is slanted outwardly and downwardly between said discharging pipe (21) and said engaging outer wall (22). A measuring cap (1) according to any of the preceding claims characterized in that said pouring mouth (16) is formed at a position displaced from the center.

Inventors: HAYASHI HIROAKI, MURAKAMI HIROAKI, WASEDA MANABU SHIMOODANAKA, HAYASHI, HIROAKI, MURAKAMI, HIROAKI, WASEDA, MANABU 1272, SHIMOODANAKA
Applicants: PROCTER & GAMBLE FAR EAST INC, PROCTER & GAMBLE FAR EAST, INC.
Application year: 1990
Main classification: G01F11
IPC codes: G01F11