US3765813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow molding apparatus
Assignee: Deacon Machinery Inc
•
Filing: 1972-07-28
•
Granted: 1973-10-16
•
Expires: 1992-07-28
Abstract
Abstract Cold parisons are conveyed through an oven for heating and then stretched and blown in a mould. A transfer assembly engages the upper end of each heated parison, removes it from the oven, and swings it into a mould and then rises to stretch the parison as a threading die holds the lower end thereof. The mould then closes and air is injected to form the bottle, after which the mould opens and the finished bottle is removed.
Inventors
- 👤 L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:55
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/28; B29C49/28008; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
204 words
An apparatus for producing blow molded articles comprising: an oven including an enclosed chamber and means for supporting tubular parisons and passing the parisons through the chamber to heat theiR parisons along their lengths; a blow mold positioned in close proximity to the oven and including means for supporting a tubular parison from below and for blow molding the tubular parison into a blow molded article; and a transfer member for transferring heated tubular parisons from the oven to the mold, said transfer member comprising, a vertical spindle movable about and vertically along a vertical axis, a horizontal transfer arm attached to the spindle and movable therewith vertically along and angularly about said axis, a gripping means attached to the transfer arm for movement therewith and extending downwardly therefrom for grasping the top of a tubular parison, said transfer member including means for moving the transfer arm downwardly at the oven, for operating the gripping means to grasp a heated parison at the oven, for moving the transfer arm upwardly to raise the grasped heated parison out of the oven, for moving the transfer arm horizontally about said vertical axis and for lowering the parison for supporting the bottom thereof by said supporting means.
Claim 2
Independent Claim
204 words
An apparatus for producing blow molded articles comprising: an oven including an enclosed chamber and means for supporting tubular parisons and passing the parisons through the chamber to heat theiR parisons along their lengths; a blow mold positioned in close proximity to the oven and including means for supporting a tubular parison from below and for blow molding the tubular parison into a blow molded article; and a transfer member for transferring heated tubular parisons from the oven to the mold, said transfer member comprising, a vertical spindle movable about and vertically along a vertical axis, a horizontal transfer arm attached to the spindle and movable therewith vertically along and angularly about said axis, a gripping means attached to the transfer arm for movement therewith and extending downwardly therefrom for grasping the top of a tubular parison, said transfer member including means for moving the transfer arm downwardly at the oven, for operating the gripping means to grasp a heated parison at the oven, for moving the transfer arm upwardly to raise the grasped heated parison out of the oven, for moving the transfer arm horizontally about said vertical axis and for lowering the parison for supporting the bottom thereof by said supporting means.
Claim 3
Dependent Claim
54 words
An apparatus according to claim 1, wherein said transfer member includes means for raising the transfer arm and gripping means and hence also raising the top end of the parison being held by the gripping means while the lower end of the parison is being held by said supporting means, thereby stretching the parison.
Claim 4
Dependent Claim
56 words
An apparatus according to claim 2, wherein said means for raising includes means for limiting the upward movement of the transfer arm at a first height at which the gripping means is above the blow mold, and said blow mold including means for cutting off the top of the parison as it closed onto the parison.
Claim 5
Dependent Claim
44 words
An apparatus according to claim 3, said transfer member including means for raising the transfer arm to a height above the said first height after the parison has been cut and for moving the transfer arm about said vertical axis back to the oven.
Claim 6
Dependent Claim
31 words
An apparatus according to claim 4, including means for releasing the top of the tubular parison for movement onto a scrap chute as the transfer arm moves back to the oven.
Claim 7
Dependent Claim
46 words
An apparatus according to claim 4, including means interconnecting the blow mold and the transfer member for coordinated movement such that during the time that the blow mold closes and forms a molded article, the transfer member moves to obtain another tubular parison from the oven.
Claim 8
Dependent Claim
81 words
An apparatus according to claim 1, wherein the said blow mold includes an opeable and closeable mold, and said support means includes a thread clamp means located below the mold for engaging the lower end of a parison, whereby when the gripper means lowers the parison at the mold, the lower end of the parison is grasped and held by the thread clamp means so that the subsequent raising of the parison by the gripper means causes stretching of the parison.
Claim 9
Dependent Claim
79 words
An apparatus according to claim 7, wherein the thread clamp means comprises a pair of arms movable towards and away from each other, and said arms being operated by a rotatable member connected to the arms by a pair of curved levers which are connected to the rotatable member such that when the arms are in the closed position the levers overlap each other in a direction perpendicular to the direction of opening and closing movement of the arms.
Claim 10
Dependent Claim
79 words
An apparatus according to claim 7, wherein said transfer means includes an up stop and a down stop for respectively limiting upward and downward movement of the transfer arm, said up stop including, for each cycle of operation of the apparatus, at least two vertical positions, the lower of which limits upward movement of the picker arm during stretching of the parison and the upper of which represents the maximum height to which the picker arm can be raised.
Claim 11
Dependent Claim
51 words
An apparatus according to claim 7, wherein said thread clamp means includes a pair of thread dies and a pair of thread clamps, each clamp having a thread die attached thereto, the two clamps being turnable abOut a common axis to close the thread dies onto the bottom of a parison.
Claim 12
Dependent Claim
75 words
An apparatus according to claim 7, said clamp means including a pair of thread dies each connected to a separate clamp member, the clamp members being movable to close the thread dies onto the bottom of the parison, a plug movable upwardly into the bottom of the parison between the thread dies and including a passageway through the plug and means for passing a high pressure fluid through the said passage and into the parison.
Claim 13
Dependent Claim
49 words
An apparatus according to claim 11, including a mold clamp means for closing the mold with the stretched parison located therein, means for opening the mold and means for injecting high pressure fluid through the said passageway while the mold is closed to shape the parison into a container.
Claim 14
Dependent Claim
27 words
An apparatus according to claim 1, including means for injecting fluid through the passageway after the mold has opened to eject the finished container from the mold.
Claim 15
Dependent Claim
32 words
An apparatus according to claim 1, including means adjacent the said discharge station of the oven for contacting the parison to cool the same as the parison is removed from the oven.
Claim 16
Dependent Claim
49 words
An apparatus according to claim 1, wherein said mold and said transfer arm operate simultaneously such that when the mold is closed during the formation of a container, the transfer arm moves back to the oven to grasp another heated parison and starts its movement back towards the mold.
Claim 17
Dependent Claim
59 words
An apparatus according to claim 15, wherein when the mold closed, it closes the uppermost part of the container being formed and cuts the parison, and wherein the said gripping means includes means for dropping the upper scrap part of the parison into a scrap receiving means as the transfer arm moves back from the mold to the oven.
Claim 18
Dependent Claim
49 words
An apparatus according to claim 1, wherein said oven means comprises a housing, a conveyor in the housing for conveying said elements along a plurality of generally parallel vertical baffles between said paths, and a heated air inlet duct below the paths and an outlet duct above the paths.
Claim 19
Dependent Claim
55 words
An apparatus according to claim 17, wherein the conveyor moves along said back and forth path continuously, said path being endless, and feed means for feeding parisons to the oven at one point in said path, and means for permitting removal of heated parisons by the said transfer member at another point in said path.
Claim 20
Independent Claim
251 words
An apparatus for producing blow molded articles comprising an oven including an enclosed housing, means for heating the interior of the housing to heat the parisons, a conveyor means movable continuously along a path in the housing, support means on the conveyor for supporting a plurality of tubular parisons in an upright position as they move through the oven, and a discharge station at which the tubular parisons are removed from the oven, a blow mold positioned in close proximity to the oven, a transfer member for transferring heated tubular parisons from the oven to the mold, said transfer member including, a vertical spindle movable vertically along a vertical axis and angularly about the vertical axis at any vertical position of the spindle, a transfer arm attached to the spindle for vertical and angular movement therewith, said transfer member including a gripping means operatively connected to the transfer arm for movement therewith to grasp a tubular parison, said transfer member including means for lowering the transfer arm to a lowered position at the oven, means for operating the gripping means to grip a parison, and means for turning the transfer member about that axis while the transfer arm is in a lowered position at the oven, such that the gripping means follow generally the same path as said conveyor means at the discharge station such that the transfer member is operable to grasp a heated tubular parison for transfer to the blow mold while the conveyor moves continuously along the path.
Claim 21
Independent Claim
251 words
An apparatus for producing blow molded articles comprising an oven including an enclosed housing, means for heating the interior of the housing to heat the parisons, a conveyor means movable continuously along a path in the housing, support means on the conveyor for supporting a plurality of tubular parisons in an upright position as they move through the oven, and a discharge station at which the tubular parisons are removed from the oven, a blow mold positioned in close proximity to the oven, a transfer member for transferring heated tubular parisons from the oven to the mold, said transfer member including, a vertical spindle movable vertically along a vertical axis and angularly about the vertical axis at any vertical position of the spindle, a transfer arm attached to the spindle for vertical and angular movement therewith, said transfer member including a gripping means operatively connected to the transfer arm for movement therewith to grasp a tubular parison, said transfer member including means for lowering the transfer arm to a lowered position at the oven, means for operating the gripping means to grip a parison, and means for turning the transfer member about that axis while the transfer arm is in a lowered position at the oven, such that the gripping means follow generally the same path as said conveyor means at the discharge station such that the transfer member is operable to grasp a heated tubular parison for transfer to the blow mold while the conveyor moves continuously along the path.
Claim 22
Dependent Claim
44 words
An apparatus according to claim 19, said transfer member further including meaNs for raising the transfer arm with the grasped parison, for turning the transfer arm horizontally about said axis to the blow mold, and for lowering the tubular parison at the blow mold.
Claim 23
Dependent Claim
45 words
An apparatus according to claim 20, said oven conveyor being an endless conveyor, means for loading parisons on the support means at a loading station, whereby the parisons are heated as they travel along the endless path from the loading station to the discharging station.
Claim 24
Independent Claim
262 words
An apparatus for producing blow molded articles comprising: an oven including means for passing elongated tubular parisons through the oven and means for heating the parisons along their lengths as they pass through the oven, a blow mold positioned in close proximity to the oven, said blow mold including means for supporting the bottoms of the tubular parisons and means for blowing air into the bottoms of the blow mold to form the tubular parisons into molded articles, a transfer member for transferring heated tubular parisons from the oven to the blow mold, said transfer member including a vertical spindle movable about and vertically along a vertical axis, a horizontal transfer arm attached to the spindle and movable therewith vertically along and angularly about said axis, a gripping means attached to the transfer arm for movement therewith and extending downwardly therefrom for gripping the top of the tubular parison, said transfer member including means for moving the transfer arm about said vertical axis between the oven and the blow mold for carrying parisons from the oven to the blow mold, a hollow removal tube having an open end positioned above the blow mold such that when the blow mold is opened after forming a molded article and the blowing means blows air, the molded article will be ejected into and through the tube, said tube being movable about a vertical axis to an operative position over the mold and an inoperative position away from the mold in a direction opposite from the direction of movement of the transfer arm to the oven.
Claim 25
Independent Claim
262 words
An apparatus for producing blow molded articles comprising: an oven including means for passing elongated tubular parisons through the oven and means for heating the parisons along their lengths as they pass through the oven, a blow mold positioned in close proximity to the oven, said blow mold including means for supporting the bottoms of the tubular parisons and means for blowing air into the bottoms of the blow mold to form the tubular parisons into molded articles, a transfer member for transferring heated tubular parisons from the oven to the blow mold, said transfer member including a vertical spindle movable about and vertically along a vertical axis, a horizontal transfer arm attached to the spindle and movable therewith vertically along and angularly about said axis, a gripping means attached to the transfer arm for movement therewith and extending downwardly therefrom for gripping the top of the tubular parison, said transfer member including means for moving the transfer arm about said vertical axis between the oven and the blow mold for carrying parisons from the oven to the blow mold, a hollow removal tube having an open end positioned above the blow mold such that when the blow mold is opened after forming a molded article and the blowing means blows air, the molded article will be ejected into and through the tube, said tube being movable about a vertical axis to an operative position over the mold and an inoperative position away from the mold in a direction opposite from the direction of movement of the transfer arm to the oven.
Claim 26
Dependent Claim
36 words
An apparatus according to claim 22, including means for interconnecting the removal tube and the transfer arm for coordinated movement such that only one of them is located over the blow mold at any one time.
Claim 27
Dependent Claim
63 words
An apparatus according to claim 23, including a fixed vertical support tube near the blow mold, a horizontal arm connected to the support tube and turnable about an axis, said arm locating the said open end of the tube, said interconnecting means being operable to interrelate turning movement of the said horizontal arm and the said transfer arm about their respective vertical axes.
Claim 28
Independent Claim
207 words
An apparatus for producing blow molded articles comprising: a base, a stationary oven removably connected to the base, said oven including a housing and means for moving tubular parisons through the oven from a loading station to a discharge station, a blow mold removably mounted on the base at about the same height as the oven and adjacent the oven and including a means for supporting a tubular parison and forming it into a molded article, a transfer member for transferring heated tubular parisons from the oven to the mold, said transfer member comprising a vertical spindle movable about and vertically along a vertical axis, a horizontal transfer arm attached to the spindle and movable therewith vertically along and angularly about said axis, a gripping means attached to the transfer arm for movement therewith and extending downwardly therefrom for gripping the top of a tubular parison, said transfer member being removably connected to the base with the said spindle located generally between the oven and the mold and generally equidistant in a horizontal line from the oven discharge station and from the center of the mold, said blow mold and said transfer arm being of modular construction and capable of being removed each independently of the other.
Claim 29
Independent Claim
207 words
An apparatus for producing blow molded articles comprising: a base, a stationary oven removably connected to the base, said oven including a housing and means for moving tubular parisons through the oven from a loading station to a discharge station, a blow mold removably mounted on the base at about the same height as the oven and adjacent the oven and including a means for supporting a tubular parison and forming it into a molded article, a transfer member for transferring heated tubular parisons from the oven to the mold, said transfer member comprising a vertical spindle movable about and vertically along a vertical axis, a horizontal transfer arm attached to the spindle and movable therewith vertically along and angularly about said axis, a gripping means attached to the transfer arm for movement therewith and extending downwardly therefrom for gripping the top of a tubular parison, said transfer member being removably connected to the base with the said spindle located generally between the oven and the mold and generally equidistant in a horizontal line from the oven discharge station and from the center of the mold, said blow mold and said transfer arm being of modular construction and capable of being removed each independently of the other.
Claim 30
Dependent Claim
47 words
An apparatus according to claim 25, wherein the oven is elongated, and said transfer member and saiD blow mold are connected to the base adjacent one end of the oven, said mold comprising mold halves movable towards and away from each other in a generally horizontal direction.
Claim 31
Dependent Claim
49 words
An apparatus according to claim 26, including a thread clamp means located on the base beneath the mold means for holding and forming the opening in the bottom of the parison and wherein said thread clamp means is also removable from the base independently from the other said means.
Claim 32
Dependent Claim
25 words
An apparatus according to claim 27, including a feeding means removably mounted above the oven for receiving parisons and delivering the same into the oven.
Claim 33
Independent Claim
87 words
An apparatus for blow molding articles comprising: an oven including means for passing elongated tubular parisons through the oven to heat the parisons along their entire lengths, a blow mold, a transfer means for taking the heated parisons from the oven to the blow mold, and stretching means for stretching each elongated parison longitudinally while it is at the blow mold just before the parison is molded into a finished article, said stretching means including the transfer means which holds one end of the parison during stretching.
Claim 34
Independent Claim
87 words
An apparatus for blow molding articles comprising: an oven including means for passing elongated tubular parisons through the oven to heat the parisons along their entire lengths, a blow mold, a transfer means for taking the heated parisons from the oven to the blow mold, and stretching means for stretching each elongated parison longitudinally while it is at the blow mold just before the parison is molded into a finished article, said stretching means including the transfer means which holds one end of the parison during stretching.
Claim 35
Dependent Claim
48 words
An apparatus according to claim 29 including support means at the blow mold for holding one end of the parison, said transfer means being operable to pull the other end of the parison while the support means hold the said one end thereof, to thereby stretch the parison.
Claim 36
Dependent Claim
58 words
An apparatus according to claim 30, said support means being operable to hold the bottom of the parison in the position which the parison will assume during blow molding, and said transfer means being operable to grasp the top of the parison and urge it upwardly to stretch the parison while the support means holds the bottom thereof.
Claim 37
Dependent Claim
60 words
An apparatus according to claim 29, said oven including means for passing the parisons therethrough in an upright position, said transfer means being a transfer arm which includes a gripping means for lifting a parison upwardly out of the oven, transferring the parison horizontally to the blow mold and lowering the parison at the blow mold onto the support means.
Claim 38
Dependent Claim
22 words
An apparatus according to claim 32, said transfer arm being rotatable about a vertical axis between the oven and the blow mold.
Claim 39
Dependent Claim
30 words
An apparatus according to claim 33, said transfer arm being movable vertically along its axis to grip the parison at the oven and release the parison at the mold station.
Claim 40
Dependent Claim
52 words
An apparatus according to claim 29 including support means at the blow mold for holding the end of the parison through which air is to be blown during the blow molding, said transfer means being operable to grasp the other end of the parison to pull the same to stretch the parison.
Claim 41
Dependent Claim
35 words
An apparatus according to claim 35, the end of the parison held by the support means being the bottom end, and means for passing air through the support means into the parison during blow molding.
Claim 42
Independent Claim
136 words
An apparatus for blow molding articles comprising: an oven including a parison loading station and a parison discharge station, continuously operable conveying means for conveying parisons through the oven to heat the same, a blow mold, a transfer means including parison hodling means for taking hold of parisons at the discharge station of the oven, removing the parisons from the continuously operable conveying means in the oven and transferring the parisons to the blow mold, and means for effecting essentially zero relative movement between the said holding means and the conveying means in the direction of movement of the conveying means at the discharge station while the conveying means continues to operate continuously, whereby the transfer means is operable to successively remove parisons at the discharge station without stopping the continuous operation of the conveying means.
Claim 43
Independent Claim
136 words
An apparatus for blow molding articles comprising: an oven including a parison loading station and a parison discharge station, continuously operable conveying means for conveying parisons through the oven to heat the same, a blow mold, a transfer means including parison hodling means for taking hold of parisons at the discharge station of the oven, removing the parisons from the continuously operable conveying means in the oven and transferring the parisons to the blow mold, and means for effecting essentially zero relative movement between the said holding means and the conveying means in the direction of movement of the conveying means at the discharge station while the conveying means continues to operate continuously, whereby the transfer means is operable to successively remove parisons at the discharge station without stopping the continuous operation of the conveying means.
Claim 44
Dependent Claim
72 words
An apparatus according to claim 37, said conveying means being an endless conveyor within the oven which includes means for supporting elongated parisons in aN upright position, said transfer means holding means being movable vertically down into the oven to take hold of a parison, movable generally horizontally with the conveying means as it takes hold of a parison, and upwardly out of the oven to remove the parison from the oven.
Claim 45
Dependent Claim
27 words
An apparatus according to claim 38, said transfer means being a transfer arm including the holding means thereon, the transfer arm being rotatable about a vertical axis.
Claim 46
Dependent Claim
38 words
An apparatus according to claim 39, wherein said transfer arm is movable about said vertical axis in timed relationship with the conveying means as the holding means takes hold of the parison to effect said zero relative movement.
Claim 47
Dependent Claim
46 words
An apparatus according to claim 40, said transfer means being movable vertically to raise the parison from the oven, horizontally about said axis to transfer the parison to the blow mold, and movable vertically at the blow mold to lower the parison to the blow mold.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |