Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
241 words
An improved injection molding filter assembly to filter pressurized melt flowing therethrough comprising: (a) an elongated hollow outer member having a central longitudinal axis, a first end and a second end, the first end having an inlet opening and the second end having an outlet opening, the outer member having a fluted inner surface defining an even number of inwardly opening longitudinally extending channels with narrow elongated lands therebetween, the lands all being located an equal distance from the central axis along their length, alternate ones of the channels extending from the inlet opening to first blind ends towards the second end of the outer member, the other intervening channels extending from the outlet opening to second blind ends towards the first end of the outer member, and (b) an elongated inner torpedo member centrally located in the outer member, having a generally cylindrical outer surface which is smaller in diameter by a predetermined amount than the said distance of the lands from the said central axis to form a number of elongated filtering slits between the outer surface of the inner member and said lands through which the melt flows from the inlet channels to the outlet channels, the inner torpedo member being longitudinally secured to have the cylindrical outer surface extend at least between the first and second blind ends, impurities too large to pass through the filtering slits being accumulated at the blind ends of the inlet channels.
Claim 2
Dependent Claim
241 words
An improved injection molding filter assembly to filter pressurized melt flowing therethrough comprising: (a) an elongated hollow outer member having a central longitudinal axis, a first end and a second end, the first end having an inlet opening and the second end having an outlet opening, the outer member having a fluted inner surface defining an even number of inwardly opening longitudinally extending channels with narrow elongated lands therebetween, the lands all being located an equal distance from the central axis along their length, alternate ones of the channels extending from the inlet opening to first blind ends towards the second end of the outer member, the other intervening channels extending from the outlet opening to second blind ends towards the first end of the outer member, and (b) an elongated inner torpedo member centrally located in the outer member, having a generally cylindrical outer surface which is smaller in diameter by a predetermined amount than the said distance of the lands from the said central axis to form a number of elongated filtering slits between the outer surface of the inner member and said lands through which the melt flows from the inlet channels to the outlet channels, the inner torpedo member being longitudinally secured to have the cylindrical outer surface extend at least between the first and second blind ends, impurities too large to pass through the filtering slits being accumulated at the blind ends of the inlet channels.
Claim 3
Dependent Claim
45 words
A filter assembly as claimed in claim 1 wherein the inner torpedo member has first and second end surfaces which abut respectively against retaining surfaces at the first and second ends of the outer member to longitudinally secure the inner member in the outer member.
Claim 4
Dependent Claim
20 words
A filter assembly as claimed in claim 2 wherein the end surfaces of the inner torpedo member are conical shaped.
Claim 5
Dependent Claim
80 words
A filter assembly as claimed in claim 2 wherein the outer member has a body portion and a retaining collar portion removably attached to the body portion, the collar portion defining the outlet opening at the second end of the outer member and having the retaining surfaces which abut against the second end surface of the inner torpedo member, whereby the inner torpedo member may be easily removed for cleaning by removing the retaining collar portion of the outer member.
Claim 6
Dependent Claim
45 words
A filter assembly as claimed in claim 1, 2 or 3 wherein the outer surface of the inner torpedo member has longitudinally spaced raised portions which abut on the lands between the channels to securely centrally locate the inner torpedo member in the outer member.