Eye rod, process and apparatus for loading the same with solutions or suspensions of active substance
First Claim
1. A process for loading eye rods with a solution or suspension of active substance, said process comprising the steps of applying said solution or suspension of active substance, in the form of droplets of constant volume, with the aid of a micrometering device which always releases the same number of droplets to each eye rod, onto the intended zones of each of said eye rods, rotating each of said eye rods in order to distribute said solution or suspension over said zone and removing the solvent or suspension agent by evaporation, so as to leave the dried active substance on each of said eye rods.
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Accused Products
Abstract
The specification describes a process and apparatus for charging eye rods with solutions or suspensions of active substance. The latter are applied dropwise, by means of a micrometering device, to specific points on the eye rods which are set in rotation, and simultaneously or subsequently the solvent or suspension agent is removed.
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Citations
11 Claims
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1. A process for loading eye rods with a solution or suspension of active substance, said process comprising the steps of applying said solution or suspension of active substance, in the form of droplets of constant volume, with the aid of a micrometering device which always releases the same number of droplets to each eye rod, onto the intended zones of each of said eye rods, rotating each of said eye rods in order to distribute said solution or suspension over said zone and removing the solvent or suspension agent by evaporation, so as to leave the dried active substance on each of said eye rods.
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2. An apparatus for loading eye rods with a solution or suspension of active substance, said apparatus comprising a micrometering system for applying droplets of said solution or suspension to each of said eye rods;
- a drying apparatus for evaporating the solvent or suspension agent from said solution or suspension applied to said eye rods;
a first straight or curved belt, driven in a first direction, for conveying said eye rods past said micrometering system and said drying apparatus; and
a second, counter rotating, straight or curved belt, which works in conjunction with said first belt in order to cause the rotation of eye rods being conveyed by said first belt. - View Dependent Claims (3, 4, 5)
- a drying apparatus for evaporating the solvent or suspension agent from said solution or suspension applied to said eye rods;
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6. An eye rod, for administering an active substance to the eye, comprising a rod-like member having on the outer surface thereof a dry coating of said active substance, said coating of active substance being confined to a band extending from a point proximate to, but not including, one end of said rod-like member.
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7. A process for loading an eye rod with an active substance, said process comprising the steps of:
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(a) applying a predetermined number of droplets of a predetermined volume of a solution or suspension of said active substance to an intended zone of said eye rod, (b) simultaneously or subsequently rotating said eye rod about its longitudinal axis, in order to uniformly distribute said solution or suspension on the surface of said eye rod in said zone, and (c) then removing the solvent or suspension agent by evaporation in order to leave dried active substance on said eye rod.
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8. A device for loadng eye rods with active substance, said device comprising:
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(a) means for conveying a plurality of eye rods along a motion path in a spaced-apart, substantially parallel relationship; (b) means located at a point along said motion path for applying a predetermined number of droplets of a predetermined volume of a solution or suspension of active substance to an intended zone of each eye rod conveyed past said point on said motion path; (c) means for rotating each eye rod being conveyed along said motion path about its longitudinal axis, in order to uniformly distribute the solution or suspension of active substance applied to said eye rod on the surface thereof in said intended zone; and
,(c) means for evaporating the solvent or suspension agent from the charge of active substance which has been applied to each eye rod, as said eye rod moves along said motion path, in order to leave dried active substance on said eye rod. - View Dependent Claims (9, 10, 11)
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Specification