1. A process for making a container having an integral handle, comprising the steps of:
a) providing a preform (6) in a mould cavity (1);
b) stretch-blow moulding the preform (6) to form an intermediate container (8) which comprises at least one convex bubble (9);
c) deforming the or each convex bubble (9) by means of an inwardly moving plug (5) to form one or more concave gripping region(s), whilst maintaining the pressure within the intermediate container (8) above 1 bar and whilst the temperature of the material in the gripping region of the intermediate container is maintained at a temperature between the glass transition temperature, Tg, and the melt temperature, Tm;
d) releasing excess pressure within the container; and
e) ejecting the finished container from the mould cavity (1, 3).
2. A process according to claim 1 wherein step b) comprises stretch-blow moulding the preform (6) to form an intermediate container (8) which comprises two convex bubbles (9).
3. The process according to claim 1 wherein step d) comprises releasing excess pressure within the container prior to withdrawing the plug (5) from within the container.
4. The process according to claim 1 wherein throughout step c) the material in the gripping region of the intermediate container is in an amorphous state.
5. The process according to claim 1 wherein in step c) the temperature of the material in the gripping region of the intermediate container is maintained at a temperature between the glass transition temperature, Tg, and the re-crystallisation temperature, Tc.
6. The process according to claim 5 wherein throughout step c) the material in the gripping region of the intermediate container is in an amorphous state.
7. The process according to claim 1 wherein step b) is carried out in a blow moulding cavity (1), and wherein step c) is carried out in a separate thermoforming cavity (3), and wherein the intermediate container (8) is transferred from the blow moulding cavity (1) to the thermoforming cavity (3) between these two steps.
8. The process according to claim 7 wherein the intermediate container (8) is reheated between step b), the stretch-blow moulding step, and step c), the thermoforming step.
9. The process according to claim 1 wherein the surface area of the, or each, convex bubble (9) of the intermediate container (8) is equal to or less than the surface area of the concave gripping region of the finished container.
10. The process according to claim 1 wherein the outer profile of the plug (5) corresponds to the interior profile of the concave gripping region.
11. The process according to claim 1 wherein the temperature of the finished container ejected from the mould cavity at step e) is below the glass transition temperature, Tg.
12. The process according to claim 1 wherein there is provided means for interlocking the opposing concave gripping regions against each other such as to substantially eliminate any relative movement when gripped.
13. The process according to claim 1 wherein the gripping region of the finished container comprises deep grip palm rest, x, (52); deep grip finger rest, y, (54); deep grip recess depth, z, (56).
14. The process according to claim 13 wherein the sum of x+2y+2z is greater than 107 mm.
15. The process according to claim 13 wherein the depth of the deep grip recess, z, (56) is greater than 20 mm.
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. An imaging lens comprising:
in order from an object side to an image surface side, a diaphragm, a first lens that is a biconvex lens having a positive power, a second lens having a negative power, a third lens having a positive power, and a fourth lens that is a biconcave lens having a negative power, wherein a condition expressed by a following expression (1) is to be satisfied:
0.7\u2266FLf1\u22663.0\u2003\u2003(1)
where,
FL: focal distance of the entire lens system
f1: focal distance of the first lens.
2. An imaging lens according to claim 1, wherein:
a condition expressed by a following expression (2) is to be further satisfied:
0.3\u2266FL|f2|\u22662.8\u2003\u2003(2)
where,
|f2|: absolute value of the focal distance of the second lens.
3. An imaging lens according to claim 1, wherein:
a condition expressed by a following expression (3) is to be further satisfied:
1.3\u2266FL|f4|\u22662.5\u2003\u2003(3)
where,
|f4 |: absolute value of the focal distance of the fourth lens.
4. An imaging lens according to claim 1, wherein:
a condition expressed by a following expression (4) is to be further satisfied:
0.3\u2266(r7+r8)(\u2212r7+r8)\u22661.2\u2003\u2003(4)
where,
r7: center radius curvature of the object side face of the fourth lens
r8: center radius curvature of the image surface side face of the fourth lens.
5. An imaging device comprising the imaging lens according to any one of claims 1 to 4 and an image sensor element.