Patent US3923441A successfully refreshed from Google Patents.
US3923441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow molding apparatus with double cycle for core rods
Assignee: Farrell Patent Co
•
Filing: 1974-06-03
•
Granted: 1975-12-02
•
Expires: 1994-06-03
Abstract
Abstract This blow molding apparatus applies a coating to a core rod and then moves the core rod into an inactive position in which it travels through one cycle of the apparatus before being brought into interaction with a blowing and stripping station during a second cycle. This travel of the parison with the core rod in an inactive position allows time for the parison to be brought to a temperature for biaxial orientation before blowing the parison. The cooling can also be used to bring the parison to a condition at which a second coating can be applied over the parison to make a laminated container or other article. The preferred construction has the core rods hinged to an indexing table for movement between active and inactive positions.
Inventors
- 👤 John J Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:16
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/4273; B29C49/42828; B29C49/02; B29C49/06; B29C49/061; B29C49/062; B29C49/063; B29C49/08; B29C49/16; B29C2049/023; B29C2949/00; B29C2949/07; B29C2949/0715; B29C2949/30; B29C2949/3032; B29C49/18
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
203 words
Blow molding apparatus including in combination two groups of core rods, an indexable support by which the core rods are carried, connections between the core rods and support, transmition means for shifting the core rods of each group between active and inactive positions, a temperature controlling chamber through which core rods that are in inactive positions pass during a cycle in which they are in their inactive positions, a coating station including means for applying a parison to successive core rods that are in active positions on the support, a blowing station for receiving successive core rods that are in active position on the table, a stripper station along the path of the active core rods, a changeover station between the coating station and the blowing station and at which a core rod can move from inactive to active position and vice versa, and wherein the support is movable to carry each core rod successively through the cycle to bring the core rods that are in active positions from one station to the next and to carry each core rod that is in inactive position past the blowing, stripper and coating stations with no interaction between the inactive core rods and these stations.
Claim 2
Dependent Claim
203 words
Blow molding apparatus including in combination two groups of core rods, an indexable support by which the core rods are carried, connections between the core rods and support, transmition means for shifting the core rods of each group between active and inactive positions, a temperature controlling chamber through which core rods that are in inactive positions pass during a cycle in which they are in their inactive positions, a coating station including means for applying a parison to successive core rods that are in active positions on the support, a blowing station for receiving successive core rods that are in active position on the table, a stripper station along the path of the active core rods, a changeover station between the coating station and the blowing station and at which a core rod can move from inactive to active position and vice versa, and wherein the support is movable to carry each core rod successively through the cycle to bring the core rods that are in active positions from one station to the next and to carry each core rod that is in inactive position past the blowing, stripper and coating stations with no interaction between the inactive core rods and these stations.
Claim 3
Dependent Claim
50 words
The blow molding machine described in claim 1 characterized by means connected with the chamber for supplying temperature controlling fluid to the chamber, and means for adjusting the temperature of the supply fluid for bringing a coating on the core rods to a temperature for further operation on the parison.
Claim 4
Dependent Claim
84 words
The blow molding machine described in claim 1 characterized by the chamber being open at one side for core rods to extend into the chamber, and the open side of the chamber extending along a course that the inactive core rods follow during a cycle of the molding apparatus, and part of the chamber between the coating station and the blowing station being wider than most of the chamber and providing clearance in which a core rod can swing betwen active and inactive positions.
Claim 5
Dependent Claim
69 words
The blow molding apparatus described in claim 1 characterized by the connecting means that connect the core rods to the support being at different locations on the support, the connecting means for the core rods at the different locations being independent of those at other locations so that the core rods at one location can be shifted between active and inactive positions independently of core rods at other locations.
Claim 6
Dependent Claim
92 words
The blow molding machine described in claim 1 characterized by the support being a rotary table with different faces at angularly related portions of the perimeter of the table, the stations confronting the angularly related faces around the table, the means connecting the groups of core rods to the table being movable to shift the core rods into different angular positions with respect to the axis rotation of the table, the core rods that are in inactive positions extending in directions having components parallel to the axis of rotation of the table.
Claim 7
Dependent Claim
124 words
The blow molding apparatus described in claim 5 characterized by the connections including bearings carried by different faces of the table with axes of rotation substantially parallel to adjacent faces of the table, the connections including also fittings supported by the bearings and movable with respect to said bearings angularly about said axes of rotation of said bearings, at least two core rods integral with and extending from the fitting of each face of the table and at a substantial angle to one another so that when one core rod extends outwardly substantially at right angles to the axis of rotation of the table, the other core rod extends in a direction having a component parallel to the axis of rotation of the table.
Claim 8
Dependent Claim
176 words
The blow molding machine described in claim 6 characterized by the core rods extending from each fitting substantially at right angles to one another so that when one core rod is substantially at right angles to the axis of rotation of the table, the other core rod is substantially parallel to said axis of rotation of the table, abutment faces on the fitting, a stop surface on the table in position to stop angular movement of the fitting when one core rod reaches an upwardly extending position substantially parallel to the axis of rotation of the table and the other core rod reaches a position substantially at right angles to the axis of rotation of the table, and another stop surface on the table in position to stop angular movement of the fitting when said other core rod reaches a downwardly extending position substantially parallel to the axis of rotation of the table and the first core rod moves into position extending outward from the table substantially at right angles to the axis of rotation thereof.
Claim 9
Dependent Claim
65 words
The blow molding machine described in claim 7 characterized by motor means on the table for moving the fitting angularly to shift one core rod between upwardly and outwardly extending position and the other core rod between outwardly and downwardly extending position, the upwardly and downwardly extending positions being the inactive positions and the oUtwardly extending positions being the active positions for the core rods.
Claim 10
Dependent Claim
95 words
The blow molding machine described in claim 6 characterized by one of the core rods extending upwardly when in inactive position and the other core rod extending downwardly when in inactive position, two temperature conditioning chambers including one chamber located above the table for receiving upwardly extending core rods, and another chamber located below the table for receiving downwardly extending core rods, each of said chambers having a wider portion at the same angular position as the other chamber to provide the changeover station at which core rods can swing between active and inactive positions.
Claim 11
Dependent Claim
65 words
The blow molding machine described in claim 6 characterized by each of the core rods having passages therein for the flow of temperature-controlling fluid into and out of each core rod, other passages in the fitting communicating with the passages for flow of temperature controling fluid into and out of the core rods, passages in the fitting including separate passages for the different core rods.
Claim 12
Dependent Claim
54 words
The blow molding machine described in claim 10 characterized by means for circulating temperature controlling fluid to and through the core rods that are in inactive positions, and a chamber through which the inactive core rods travel during a revolution of the table, and temperature-controlling fluid supply means for supplying fluid to the chamber.
Claim 13
Dependent Claim
40 words
The blow molding machine described in claim 5 characterized by the chamber being curved about the axis of rotation of the table, and the chamber being open at the side through which the inactive core rods extend into the chamber.
Claim 14
Dependent Claim
108 words
The blow molding machine described in claim 12 characterized by a first group of core rods that extend upwardly and generally parallel to the axis of rotation of the table when in inactive position, a second group of core rods that extend downward and generally parallel to the axis of rotation of the table when in inactive position, and the core rods of each group extending generally perpendicular to the axis of rotation of the table when in active position, a chamber above the table for temperature conditioning core rods of the first group and another chamberbelow the table for temperature conditioning core rods of the second group.
Claim 15
Dependent Claim
67 words
The blow molding machine described in claim 13 characterized by the table being movable up and down to move the core rods up and down to accommodate the opening and closing of a blowing mold, one of the chambers being movable up and down with the table to accommodate the up and down movement of the inactive core rods as they move in unison with the table.
Claim 16
Dependent Claim
88 words
The blow molding machine described in claim 1 characterized by transition means at the changeover station, control means for operating said transition means to shift each successive core rod into its inactive position for travel through a cycle from the changeover station past all other stations including the coating station and back to the changeover station, the control means operating the transition means to restore each inactively positioned core rod to active position as the core rod completes its temperature conditioning cycle and returns to the changeover station.
Claim 17
Dependent Claim
85 words
The blow molding machine described in claim 2 characterized by the means for adjusting the temperature of the coating, as it passes through the chamber, maintaining a temperature that brings the coating on the parison to an orientation temperature by the time it reaches the blowing station, the blowing station having a mold with a cavity shaped to cause a parison, blown therein, to stretch both in the direction of extent of the length of the core rod and also circumferentially to obtain biaxial orientation.
Claim 18
Dependent Claim
133 words
The blow molding machine described in claim 2 characterized by the means for adjusting the temperature of the coating, as it passes through the chamber, maintaining a temperature that brings the parison to an orientation teMperature, a first blowing station having a mold with a cavity shaped to stretch a parison, blown therein, mostly in the direction of the length of the core rod for orientation in the direction of the length of the blown article, and a second blow mold to which the core rod from the first blowing station is transferred to blow the parison to its final shape and size, the second blow mold having a cavity shaped to expand the parison further by increase in cross section for orientation in the direction of the circumference of the blown article.
Claim 19
Dependent Claim
108 words
The blow molding machine described in claim 2 characterized by means at the coating station for applying the parison to each core rod at a high temperature, the means for controlling the temperature of the parison on the core rod, as the core rod travels through the chamber, cooling the parison to a temperature at which a second parison can be applied over the first parison without consequential damage to the first parison, and a second coating station beyond the location at which each core rod completes its temperature controlling cycle in the chamber, the second coating station having means for applying a second coating over the parison.
Claim 20
Dependent Claim
66 words
The blow molding machine described in claim 18 characterized by injection molding apparatus at the first coating station, another injection molding apparatus at the second coating station for applying the second parison over the first parison which was applied to the core rod by the first coating station, and a blowing station beyond the other injection molding apparatus for blowing both of the co-injected parisons simultaneously.
Claim 21
Dependent Claim
99 words
The blow molding apparatus described in claim 1 characterized by a station between the coating station and the changeover station including means for blowing the parison to a small extent and to a length beyond the end of the core rod sufficient to prevent the neck portion of the parison from pulling away from a flange at the neck end of the core rod as a result of shrinkage of the parison as it cools during its cycle of movement with the core rod in an inactive position and before the blowing of the parison at said blowing station.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |