Apparatus for the production of monolithic intraocular implants
OwnerThomas H. Shepherdinventor
Life of this patent
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Abstract
There is provided a mold fabricated from thermoplastic material incorporatinog a thin flexible, substantially knife-edged rim projecting from the periphery of the mold cavity on both the male and female portions thereof, and having a reservoir to contain additional monomer, such reservoir being separated from the mold cavity by the conjunction or mating line of the peripheral rim projections. Such molds are useful for the molding of optical implants which do not require further machining or similar treatment.
Claims14
A thermoplastic mold for producing an intraocular implant, said implant comprising a lens portion and support means therefore, for holding said implant in place when inserted intraoccularly, said mold comprising:
- (a) a male portion comprising a core having a cavity therein said cavity having
- (i) a first molding surface having a principle longitudinal axis and having a predetermined curvature to form a first surface of said desired lens portion of said implant said core having
- (ii) a second molding surface, opening into said first molding surface and having a predetermined shape to provide a first surface of said support means and
- (iii) a first thin, flexible rim means having a lower edge, surrounding the outer periphery of said surfaces, and
- (b) a female portion comprising a core having a cavity therein and a core ring surrounding said core, said cavity having
- (i) a third molding surface having a principle longitudinal axis orientable coaxially with the principle longitudinal axis of said first molding surface, and having a predetermined curvature to form a second surface of said desired lens portion of said implant said core having
- (ii) a fourth molding surface, opening into said third molding surface and having a predetermined shape to provide a second surface of said support means and
- (iii) a second thin, flexible rim means having an upper edge, surrounding the edges of said third and fourth molding surfaces,
- said second and said fourth molding surfaces opening in to said first and said third molding surfaces respectively at least two distinct locations,
- the rim means of said male and female portions being contactable at said lower and upper edges to form a contact seal therebetween and form the outer edges of said implant and a reservoir means for holding excess monomer being thus provided between said male core, said female core ring, the portion of said female core outside said rim means and both of the said rim means in contact with each other.
A thermoplastic mold for producing an introcular implant, said implant comprising a lens portion and support means for holding said implant in place when inserted intraoccularly therefore, said mold comprising:
- (a) a male portion comprising a core having a cavity therein said cavity having
- (i) a first molding surface having a principle longitudinal axis and having a predetermined curvature to form a first surface of said desired lens portion of said implant and said core having
- (ii) a second molding surface, opening into said first molding surface and having a predetermined shape to provide a first surface of said support means and
- (iii) a first thin, flexible rim means having a lower edge, surrounding the outer periphery of said surfaces, and
- (b) a female portion comprising a core having a cavity therein and a core ring surrounding said core, said cavity having
- (i) a third molding surface having a principle longitudinal axis orientable coaxially with the principle longitudinal axis of said first molding surface, and having a predetermined curvature to form a second surface of said desired lens portion of said implant and said core having
- (ii) a fourth molding surface, opening into said third molding surface and having a predetermined shape to provide a second surface of said support means and
- (iii) a second thin, flexible rim means having an upper edge, surrounding the edges of said third and fourth molding surfaces,
- the rim means of said male and female portions being contactable at said lower and upper edges to form a contact seal therebetween and form the outer edges of said implant and a reservoir means for holding excess monomer being thus provided between said male core, said female core ring, the portion of said female core outside said rim means and both of said rim means in contact with each other,
- said rim means being each provided with an inner face and an outer face, said inner faces subtending an angle of at least 180.degree. C. to each other at their line of contact,
- said male portion further comprising a core lip surrounding said core, wherein the lower edge of said core lip contacts the upper edge of said core ring.
Dependencies are inferred from the claim text.