What is claimed is:
1. A plastic container comprising:
a tube of a plastic laminate;
a bottom wall formed so as to be joined to an inner circumference of a lower end part of the tube by an insert injection molding means;
a hoop formed on an outer circumference of an upper end part of the tube by an insert injection molding means; and
a top cover provided with a spout and bonded to an upper end surface of the hoop.
2. The plastic container according to claim 1, wherein the top cover is provided with projections in a part thereof corresponding to the hoop, and the projections are crushed by an ultrasonic means to bond the top cover to the hoop.
3. The plastic container according to claim 1, wherein the plastic laminate is an opaque film including a metal foil.
4. The plastic container according to claim 1, wherein the plastic laminate is a transparent film.
5. A plastic container assembly comprising:
the plastic container of claim 1;
an outer container capable of containing the plastic container.
6. The plastic container assembly according to claim 5 wherein the tube of the plastic container is tapered from its upper end toward its lower end.
7. The plastic container assembly according to claim 5 or 6 further comprising a holding cap having a side wall provided with a screw thread on its inner circumference;
wherein the outer container has an open end part provided with a screw thread on its outer circumference, and the holding cap is screwed on the open end part of the outer container after inserting the plastic container in the outer container to fasten the plastic container to the outer container.
8. A method of manufacturing a plastic container comprising a tube of a plastic laminate, a bottom wall formed so as to be joined integrally to an inner circumference of a lower end part of the tube, a hoop formed so as to be joined integrally to an outer circumference of an upper end part of the tube, and a top cover provided with a spout and bonded to an upper end surface of the hoop, said method comprising the steps of:
forming the tube by rolling a plastic laminate in a tubular shape;
putting the tube on a mandrel;
inserting the mandrel holding the tube in a mold so that a first molding cavity connected to a runner formed in the mold, for molding the bottom wall of the plastic container is formed inside one end part of the tube and a second molding cavity connected to a runner formed in the mold, for molding the hoop is formed around the other end part of the tube;
injecting a molten resin through the runners into the first and the second cavity by an insert injection means to form the bottom wall and the hoop; and
bonding the top cover provided with the spout to an upper end surface of the hoop.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A wheel support bearing assembly, comprising:
an outer member having an inner peripheral surface formed with a plurality of outer raceways;
an inner member positioned inside the outer member with an annular working space defined between it and the outer member, said inner member having an outer peripheral surface formed with inner raceways in mating relation with the respective outer raceways in the outer member;
rows of rolling elements accommodated within the annular working space and rollingly received in part within the outer raceways in the outer member and in part within the inner raceways in the inner member; and
at least one sealing member fitted to one of the inner and outer members sealing one of opposite open ends of the annular working space delimited between the inner and outer members, said sealing member having an approximately uniform annular cross section and a plurality of elastic sealing lips which extend towards a sealing surface defined directly on the other of the inner and outer members or defined on a sealing contact member fitted to the other of the inner and outer members, one of said elastic sealing lips extending in a direction generally axially inwardly of the annular working space and defining an axially innermost sealing lip while the other elastic sealing lips being kept in sliding contact with the sealing surface;
wherein the innermost sealing lip is a non-contact sealing lip leaving a gap between a free end thereof and the sealing surface of the sealing contact member, a size of the entire gap gradually increases in a direction away from the sealing surface area and inwardly of the annular working space, said gap being of a size sufficient to
permit flow of air therethrough, and
prevent a lubricant from passing therethrough and to provide a non-contact sealing effect when a relative rotation takes place between the outer and inner members.
2. The wheel support bearing assembly as claimed in claim 1, wherein the at least one sealing member includes a core metal and an elastic member rigidly mounted on the core metal and wherein all of the elastic sealing lips are an integral part of the elastic member.
3. The wheel support bearing assembly as claimed in claim 1, wherein the gap is defined in a radial direction between a free end face of the axially innermost sealing lip and the sealing surface.
4. The wheel support bearing assembly as claimed in claim 3, wherein the free end of the axially innermost sealing lip extends inwardly of the annular working space between the inner and outer members.
5. The wheel support bearing assembly as claimed in claim 1, wherein the free end face of the axially innermost sealing lip which confronts the sealing surface has a width, as measured in a direction across a thickness of the axially innermost sealing lip, which is greater than that of any one of the remaining elastic sealing lips.
6. The wheel support bearing assembly as claimed in claim 1, wherein the sealing contact member includes a cylindrical wall and an radially upright wall protruding radially outwardly from the cylindrical wall so as to render the sealing contact member to represent a generally L-sectioned configuration, and wherein the innermost elastic sealing lip confronts a first portion of the sealing surface defined on an outer peripheral surface of the cylindrical wall and at least one of the remaining elastic sealing lips is held in sliding contact with a second portion of the sealing surface defined on the radially upright wall that confronts the sealing member.
7. The wheel support bearing assembly as claimed in claim 1, further comprising a ring-shaped multi-pole magnet secured to the sealing contact member, said multi-pole magnet magnetized to have a plurality of opposite magnetic poles alternating with each other in a direction circumferentially thereof.
8. The wheel support bearing assembly as claimed in claim 1, wherein the inner member has one end formed with a flange which extends radially outwardly beyond a level of an outer periphery of a cylindrical portion of the outer member and wherein the sealing member is used to seal one of the opposite open ends of the annular working space adjacent such flange.
9. A wheel support bearing assembly, comprising:
inner and outer members defining an annular working space therebetween, and accommodating lubricated rolling elements within the annular working space; and
a sealing member fitted to one of the inner or outer members and sealing an open end of the annular working space, the sealing member having
an approximately uniform annular cross section,
at least one elastic sealing lip maintaining sliding contact with a sealing surface defined on the remaining one of the inner or outer members, or on a sealing contact member fitted to the remaining one of the inner or outer members, and
an axially innermost elastic sealing lip extending axially inwardly of the annular working space and defining a gap between an end thereof and the sealing surface, a size of the entire gap gradually increasing in a direction away from the sealing surface and inwardly of the annular working space, the gap being sized to permit flow of air therethrough and provide a non-contact sealing effect to prevent a lubricant from exiting therethrough during relative rotation between the inner and outer members.