Dispensing – With cutter and/or punch – To form dispensing opening in container
Reexamination Certificate
1999-05-10
2001-03-27
Shaver, Kevin (Department: 3754)
Dispensing
With cutter and/or punch
To form dispensing opening in container
C222S001000, C222S095000, C222S256000, C222S386000, C222S466000
Reexamination Certificate
active
06206242
ABSTRACT:
BACKGROUND
1. Field of the Invention
This invention relates generaly to dispensers for viscous material, and more particularly to a system or apparatus for delivering and guiding a paste from a flexible storage container accommodated in a dimensionally stable container (“pot”) downwards into a dispenser operating by reduced pressure.
2. Discussion of Related Art
Liquid to paste-form detergents are well known in the prior art. They are generally formulated to meet domestic requirements, i.e. they are expected to be sufficiently liquid so that they can be poured out and measured/dosed without difficulty. Since, in addition, they are expected to be stable in storage over a relatively broad temperature range, the use of organic solvents and/or hydrotropic additives cannot normally be avoided. However, such additives do not contribute to the actual washing process, are comparatively expensive and, in addition, take up packaging space and transportation and storage capacity. The presence of inflammable solvents is particularly troublesome and necessitates additional safety precautions on account of the relatively high consumption of detergents in laundries. Because of this, detergent concentrates of the type mentioned can only be used to a limited extent, if at all, in laundries.
Accordingly, powder-form detergents are mainly used in laundries. Since the exact dosing of powder-form detergents is problematical or labor-intensive, particularly in large and extensively automated laundries, the detergents are mostly stored and dispensed in predissolved form as stock liquors, i.e. a water-based concentrate is prepared and delivered to the individual points of consumption. However, the detergents typically used in laundries contain comparatively high levels of washing alkalis which are only soluble to a limited extent in cold water and, lead to so called salting-out effects. They promote phase separation with the result that the organic components, more especially the nonionic surfactants and soaps, separate and cream up. Accordingly, the concentrates have to be diluted relatively heavily with water and, in addition, the stock liquors have to be constantly and intensively mixed and circulated to prevent individual components being deposited in the feed lines to the points of consumption. Processes such as these require considerable investment in large mixing vessels and the associated static mixers and feeders, and also require a constant supply of energy for the heating and circulation of the stock liquors.
A detergent which meets these requirements is proposed in EP 0 295 525. This detergent is a paste which imposes particular demands on handling for the purpose of dosing and mixing with water as solvent. Detergent pastes such as these are transported and stored in large containers.
SUMMARY OF THE INVENTION
The technical problem addressed by the present invention is to design a system in such a way that the paste is safely and controllably delivered by simple means. The solution to this problem in one embodiment of the invention includes an opening is centrally positioned and surrounds a pressure-tight connection between a storage container placed in a removable pot above a dispenser, and the access to the dispenser. The paste is guided downward into the dispenser. If the container is flexible, a follower plate is placed on the top of the container within the pot. The follower plate applies pressure on the container to insure substantial emptying thereof. handles are provided on the outside of the pot in the upper part thereof facilitate the handling and exact alignment.
A central recess is provided in the bottom of the follower plate to facilitate the arrangement of the components within or concentric with the central opening of the dispenser which project into the pot. In addition, the bottom of the follower plate is shaped to match the base of the pot to ensure that when the container is almost empty, the peripheral residues of the paste are taken up and forced into the middle where a recess in the plate bottom that forms a space for collecting residues.
If there is a gap between the inside wall of the pot and the edge of the follower plate which is capable of accommodating twice the wall thickness of the flexible container, this advantageously allows an arrangement in which—as emptying of the container progresses—the envelope of the emptied container can be taken up at the edge between the follower plate and the pot without being compressed as the follower plate continues to descend. This prevents the constituent material of the container from crumpling which would be a serious obstacle to complete emptying thereof.
By forming the follower plate with a central bore which opens into the recess, the air displaced into the recess of the follower plate through the bulging out of the flexible container is diverted so that the container is able to spread out freely.
To achieve complete emptying of the container, the follower plate has to be relatively heavy. Its handling is advantageously facilitated by the provision of a handle on the upper part of the follower plate.
REFERENCES:
patent: 3847304 (1974-11-01), Cohen
patent: 3987941 (1976-10-01), Blessing
patent: 4162501 (1979-07-01), Mitchell et al.
patent: 4231492 (1980-11-01), Rios
patent: 4889644 (1989-12-01), Amberg et al.
patent: 5178305 (1993-01-01), Keller
patent: 5405053 (1995-04-01), Zublin
patent: 5501368 (1996-03-01), Brandhorst et al.
patent: 5553740 (1996-09-01), King et al.
patent: 5765724 (1998-06-01), Amberg et al.
patent: 44 30 418 (1995-10-01), None
patent: 44 14 708 (1995-11-01), None
patent: 0 295 525 (1988-12-01), None
patent: 0 459 943 (1991-12-01), None
Amberg Guenther
Huber Wolfgang
Rutz Klaus
Cartagena Melvin A
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Murphy Glenn E. J.
Shaver Kevin
LandOfFree
Pot with a flexible storage barrel and follow-up plate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pot with a flexible storage barrel and follow-up plate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pot with a flexible storage barrel and follow-up plate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2499708