CA2107890A1 - Device for heating a container - Google Patents
Device for heating a containerInfo
- Publication number
- CA2107890A1 CA2107890A1 CA 2107890 CA2107890A CA2107890A1 CA 2107890 A1 CA2107890 A1 CA 2107890A1 CA 2107890 CA2107890 CA 2107890 CA 2107890 A CA2107890 A CA 2107890A CA 2107890 A1 CA2107890 A1 CA 2107890A1
- Authority
- CA
- Canada
- Prior art keywords
- molded body
- heating element
- container
- casing
- recess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Cookers (AREA)
Abstract
DEVICE FOR HEATING A CONTAINER
ABSTRACT
A device for heating a container, especially for heating a laboratory container (1), with a moulding (2) having a recess (3) to take the container and a preferably tubular electric heating element (4) substantially matching the shape of the container, the heating element (4) being preferably spirally arranged in the recess (3), is constructed to ensure the interchangeability of the heating element (4) while ensuring that it operates reliably, on the basis of a simple design, in such a way that the heating element (4) is secured by its end forming the opening for the container to a support ring (6), that the support ring (6) has an at least slightly greater diameter than the recess (3) in the moulding (2) and that the heating element (4), thanks to the support ring (6) being secured at the upper edge region (7) of the moulding (2), projects into the recess (3) where it can expand sufficiently towards the wall and floor the moulding (2) when heated.
ABSTRACT
A device for heating a container, especially for heating a laboratory container (1), with a moulding (2) having a recess (3) to take the container and a preferably tubular electric heating element (4) substantially matching the shape of the container, the heating element (4) being preferably spirally arranged in the recess (3), is constructed to ensure the interchangeability of the heating element (4) while ensuring that it operates reliably, on the basis of a simple design, in such a way that the heating element (4) is secured by its end forming the opening for the container to a support ring (6), that the support ring (6) has an at least slightly greater diameter than the recess (3) in the moulding (2) and that the heating element (4), thanks to the support ring (6) being secured at the upper edge region (7) of the moulding (2), projects into the recess (3) where it can expand sufficiently towards the wall and floor the moulding (2) when heated.
Description
7$~
Translation P~T/DE 92/00301 DE~ICB POR ~Ea~G A CONTAI~ER
' The invention relates to a device for h~at m g a container, in particulax for heating a laborator~
container, with a molde~ body having a recess for xeceiving the container, and an electric heating el~ment .
preferably constructed ~s a tubular heater and . ..
substantially adapted ~o the shape of the container, the , heating ele~ent being arranged in the recess, preferably :. in t~piral shape. :
Device3 of the kind in ~uestion ~ave been known from practice for years. ~uch devices are described, .
among other things, as heating hoods. In the~e heatinq hoods, the tubular hea~ing element~ are n~rmally ~pi~ally , bent and embedded in a knit or ~abric of fiber glas~ yarn i, or ~iber glas~ ~ilamont~. To ensure that the tu~ular heating element maintains a shape adapted to the i~ laboratory container to be hea~ed, the ~iber glass yarn i6 woven, knitted, braided, or crocheted around the t~bular h~ating element in a tight and closel~ ~itting manner.
Finally, the tubular heating element rest~ on a molded ..
body which forms an insulating aa~ing or a support.
Fur~he~ k~own a~e devi¢es~ in ~hich the molded or ~upporting body is mad~ o~ pressed ~ne~al or ceramic fiber mat~rial. To prevent moisture ~rem pen-trating ~nto I the materlal, the latter $~ impr~nated, ~or example, with an epoxy ro~n~ The ~old-d body o~ thi~ known deviae is pro~id~d with a rece~ adapt~d to tho laboratory container to ~e heated, the surface of the recesfi being i~ aontact with a heating element. The heating QlomQnt may likewis~
be embedded ln the sur~ace of the recess of the molded body.
i! . , ': :
Translation P~T/DE 92/00301 DE~ICB POR ~Ea~G A CONTAI~ER
' The invention relates to a device for h~at m g a container, in particulax for heating a laborator~
container, with a molde~ body having a recess for xeceiving the container, and an electric heating el~ment .
preferably constructed ~s a tubular heater and . ..
substantially adapted ~o the shape of the container, the , heating ele~ent being arranged in the recess, preferably :. in t~piral shape. :
Device3 of the kind in ~uestion ~ave been known from practice for years. ~uch devices are described, .
among other things, as heating hoods. In the~e heatinq hoods, the tubular hea~ing element~ are n~rmally ~pi~ally , bent and embedded in a knit or ~abric of fiber glas~ yarn i, or ~iber glas~ ~ilamont~. To ensure that the tu~ular heating element maintains a shape adapted to the i~ laboratory container to be hea~ed, the ~iber glass yarn i6 woven, knitted, braided, or crocheted around the t~bular h~ating element in a tight and closel~ ~itting manner.
Finally, the tubular heating element rest~ on a molded ..
body which forms an insulating aa~ing or a support.
Fur~he~ k~own a~e devi¢es~ in ~hich the molded or ~upporting body is mad~ o~ pressed ~ne~al or ceramic fiber mat~rial. To prevent moisture ~rem pen-trating ~nto I the materlal, the latter $~ impr~nated, ~or example, with an epoxy ro~n~ The ~old-d body o~ thi~ known deviae is pro~id~d with a rece~ adapt~d to tho laboratory container to ~e heated, the surface of the recesfi being i~ aontact with a heating element. The heating QlomQnt may likewis~
be embedded ln the sur~ace of the recess of the molded body.
i! . , ': :
2 ~
Z ..
Howe~er, the a~oresaid devices as known from practice are proble~a~ic in practiae, ln~s~uoh a~ the heating ele~ent is c08~1y to ~anufacture a~ a result o~
the necessary netting or the like, and cannot easily be exchanged, in par~icula~ when the heating elements are e~bedded. Con~equently~ when a heating element malfunctions, it will be nece~sary to exc~an~e the entire device or at least the heating element including its complete netting.
~ t is therefore the object of t~e pxesent invention to configure and fu~ther develop the devi~e of the initially described kind such ~ha~ it ensures the exahangeability of the heating element, wh~le being reliably in~talled based on a ~imple construction.
The de~ice of the pre~ent invention for heating a container, in particular a laboratory ~ontainer, accompli~hes the above ob~ect with the characteri~tic features of claim 1. Accordingly, in the initially described device, the heating elæment i8 attaahed with its end ~orming the opening for the container to a retainer or holding ring. The retainer ring has at least a slightly la~ger diameter than the rece~s o~ the molded ~o~
Furthermore, a~ a result of lo~alizing the retainer ring on the upper edge region of the molded body, the heatin~
element extends into the reces~ suoh that, as it heats up, it i~ able to expand adeguately toward the wall and bottom o~ the molded body.
In acaordanoe ~ith th~ invention it ha#
lni~ially b~en r~cogniz~d that ths heating ~men~ cah be install~d in the de~ic~ for an ex~hang~ With simp~e te~hnical mean~, ln that the heating element i8 ~eaured with its end forming the opening ~or ths cont~iner to a retainer ring. This xetainer ring ~erves to ~eaure ~hs hGating e~ament at the upper edge of the molded ~ody, it being neces~ary that the retainer ring have at least a $ ~ ~
~lightly larger dia~eter than the recess o~ the ~olded body. Furthermore~ it ha~ b~en ~e~ogni~ed that the arrangement of a retainer ring or the mounting of the hea~ element by means of the retainer ring i~ al~o of advantage ~ith respect to the thermal expansion of the heating element occurring during the heatihg, when ~ a result of localizing the ~etainer ring ~n the upper edge region of the molded body, i.e., a~ter its install~tion, the ~eating ele~ent extends into the rece~ ~uch that, as it heat~ up, it is allowed to expand adequately toward ~he wal~ and ~ot~m of the molded body. In other words, in the ~unheated" condition of the device, it is necessary to ~pace the heating element from the uall and the lower bottom of ~he molded body such that no compressive stres~es cau~ed by the ~olded ~ody occur at maximal thermal expansion.
. The exchangeability of the heating element, in particular ~rom the viewpoints of economy and costs, i~
~urther favored, in ~ha~ the heating element itself is not provided with a c05tly netting ~or the protection or po~itioninq o~' the containe~ to ~e heated. However, in . order to provide the re~eptacle or laboratory container .3 which normally consists of gl~ss, to a aertain degree with l a fir~ support within the tubular heating element, and i moreover to prote~t it against damage resulting from the hard sur~ace o~ the heating elewen~, advantageousl~ the latter i~ loosely covered with a cloth which overliQ~ the : upper edge region ~ the molded body, and i~ simple to ~emove wh~n the h~atlng elem~nt i~ en out.
, Furthexmore, the molted body is surround~d by R ca~ing whlch extends ~ith lts rim at lea~t ln part over the upper edge region, thereby clamping the cloth, in the a6sembled condition, between the upper edge ~eglon o~ the molded '. body and/or the retainer ring and the ca6ing rim. This mea~Ure has accomplished that the heating element is ;l ~
;' :
2~7.~0 4 :
cus~ioned to a certain degxee relative to the container to ~e warmed or heated, and that, contraxy to the previously customary ne~ting or the ll~e, this cushioning can ~e e~ortle~s removed, when exc~anging the heating element or for purposes o~ replacing a soiled cloth. :.
Arranged in further advantageous manner in the region between the casing ~i~ and the upper edge region of the molded body or the cloth aovering same is a seal or pacXing, on the one hand for purpose~ of securing the ~;
aloth in force-locking engage~ent, and on the other han~ :
for preventing ~luid from penetrating from, ~or example, a bursted container between the aasing and the molded body.
Thie paoking ~eals the region ~etween ~he ca~ing rim and the edge region of the molded body as adequately as i~
~u~t possible with a f~bric or cloth extending therebe~ween.
In a fu~her advantageous manner, the seal is provided as a gasket which co~nprise~ a thicker inner ring portlon and a thinner oU~er ring portion. In its in~tallQd oondition, the thinner outer ring portion i~
~ranged on the edge ~egion or the cloth below the casing rim, and the thicker ihner ring portion on the edge ~egion or cloth outside the casing rim, i.e. toward the recess.
This con8tru~tional measure ~urther ~avors the sealing bQtween the casing and the molded body.
With ~espect to the material, the cloth covering the ~eating element consistB o~ a temperature-resistant material, pre~era~ly a gla8~ ~abric. The previou81y mentioned ~eal ~r packing is m~de o~ XUbb~, in particul~r : :
siliaon. ~h~ casing should nd~ahtageou~ly cons~ st o~ a pre~o~ably acid-resistat~t pla~tic.
With respect to the con~tru~tional configuration o~ the ca~ing it i~ of fur~her advantage, ~hen the ca~ing con6i~t~ on the one hand of an upper portion ana on the oth~r hahd o~ a lower portion detachable ~rom the upper portion of the casing. In the assembled condition of the device, the upper portiQn o~ the ca~in~ is slipped ~rom the top onto the mold~d body, ~o that likewise in the asse~led condition the lower portion o~ ~he ca~ng is bolted t~ and/or eng~ged ~rom the bottom with the upper portion of the casing~ The power supply coul~ in this instance extend through the molded ~ody and through the lower portion of the aasing to the outside of the device.
An ON~OFF switch as well a~ the button actuator of a C~cuit brea~er or the like could be arranged on the upper portion o~ the casing.
~ ith r~speot to special ~inds of applications e~ploying hazardous o~ especially aaustic fluids and with respe~t to the exchangeab~lity of the heating element it will be further advantageou~, when for purposes of safely ~eceiving the container, a cup is provided which can be in~erted i~to the re~ess or into the spac~ formed ~y the heating element, and which i3 adapted substantially to the shape o~ the con~ainer. ~his cup will then be placed on the aloth covering the heating element, and is thereby largely secured against tipping. Hazardous ~ubstances whiCh may exit from the container or outflow therefrom at a brsakage of the container, will be caught by the cup, 50 as to exclude a ~oiling or even destruction of the aloth on the one hana and of the heAting element on the other.
As regards caustic substances the cup could be made o$ a high grad~ ~tee~.
Finall~, within the 5COp~ 0~ a ~uxthRr ombodi~nt~ it is po~sible to aon~t~t th~ mold~d body o~
th~ d~vio~ in aaoordanco w~th ~he invantion also in two parts. In this in3tanae, the ~ub portion forming the reaess an~ la~gely a~apted to the shape of the aontainer could be ~upported by an i~dependent oupport portion prefQra~ly construated in ring ~hape. Last not least for pUrpOS~5 0~ ~avlng material, the tub pnrtion could be :
2:~Q78~ ~
; 6 provided with an ou~er wall substantially par~ l to the recess or inner wall, it being only nece~a~y to ensure t~at the wall ~hicXne~s o~ the tu~ po~tion i5 dimensioned such t~at a laboratory container i~ held adeguately and safely. This configuration of the molded body a~lows to reduce in any event consider~bly the ~aterial necess~ry ~or it8 manufacture, thereby decreasing t~e manufacturing costs altogether.
Various possibilitie~ exist to advantageously con~igure and fu~ther develop the teaching oP the present invention. To this end, re~erence may he made on the one hand to the clai~s dependent from claim 1, and on the other hand to the following description of two embodiments o~ the invention wit~ ~eference to the drawing~ In conjunction with the description o~ the preferred embodiment of the invention with reference to the drawing, also generally preerred e~bodiments and ~urther j develop~ent~ of the teaohing are descxibed. In the drawing:
Figure 1 is a ~che~atic, perspect~ve view o~ an embodiment of a dev~ce in accordance with the invention for heating a ~ontainer with an inserted container;
Figure 2 is a schematic ViQW, cut and enlarged, of the embodi~ent of Fig~re 1:
Figure 3 shows a heating ele~ent o~ the embodi~ent o~ Figur~ 1 constructed as a tubular heating elementt ~ igur 4 i~ a ~chQmati~ ~ectione~ ~ie~ o~ tho molded body oP the embodlm-nt o~ ~lgur0 1; and Fig~e ~ is ~ ~ohemat~c, ~o~tloned view o~ a bip~tite molded body ~ second embodi~ent o~ a deviae in accordance with the invention ~or heating a contain~r.
Shown in Flgure 1 iB a schematic ~iew o~ a d~vic- ~or heating a l~boratory container 1. ~hi~ device oompr~--s, ~ ~ho~n in Pigure a, a molded ~ody 2, ~hloh ~
again provided with a recess 3 ~or re~ei~ing the lab~ratory container 1. For heating a heati~g ele~ent ~
i~ used which is c~n.~tructed as a tubular heating element and adapted -~ub~tantially to the ~hape of labora~ory container 1.
Shown in both ~igure 2 and Figure 3 is that heating ele~ent 4 iæ spirally arranged in recess 3 of molded body 2.
In accordance ~ith the invention, the heatin~
element ~ is atta~hed with its end 5 forming the opening for laboratory ¢ontainer 1 to a retainer ~ing S which is bQst seen in Figure 2. This retainer ring 6 ha~ at least a ~light~y larger diameter than recess 3 o~ molded boqy Z.
As can be noted by way of indication in Figure 2, the localizing of retainer ring ~ on the upper edge region 7 o~ molded body 2 permits the heating element ~ to extend into re~e~s 3 such that, as it heats up, it is allowed to exp~nd ~dequa~ely to~ard the wall and bottom o~ ~olded body 2.
Further #hown by wa~ ~ indi~ation in Figures 1 and 2 i8 that the heating element ~ is loosely covered with ~ cloth 8 overlying the upper edge region 7 of molded body 2. Furthermore, the ~olded body ~ is sur~ounded by a casing 10 which extends with a ri~ 9 at least in part over the upper ed~- r~glon 7, the cloth 8 being clamped ~etween .
the upper edge r~gion 7 of molded body 2 or retainer ring 6 and rim 9 o~ t~e ca~i~g.
As can ~urther be no~d ~rom Figu~e~ 1 and 2, a ~eal ~ ar~anged b~tween ca~ing ri~ ~ and upper edge r-gion 7 ~ mo~aed bo~ 2 or cloth 8 extending the~eover.
A3 i~ ~urthe~ ~hown in Figure 2, the ~eAl 11 ~5 mad~ as a ga~ket with a thi~ker ihner ring portion 12 and a thinner outer ring portion 13, the latter being arranged on the ~dg~ region 7 below casing rim 9 and the thicker ihner ~ng portion extending outside casing rim 9 toward receQs 8 ~1~7~
Z ..
Howe~er, the a~oresaid devices as known from practice are proble~a~ic in practiae, ln~s~uoh a~ the heating ele~ent is c08~1y to ~anufacture a~ a result o~
the necessary netting or the like, and cannot easily be exchanged, in par~icula~ when the heating elements are e~bedded. Con~equently~ when a heating element malfunctions, it will be nece~sary to exc~an~e the entire device or at least the heating element including its complete netting.
~ t is therefore the object of t~e pxesent invention to configure and fu~ther develop the devi~e of the initially described kind such ~ha~ it ensures the exahangeability of the heating element, wh~le being reliably in~talled based on a ~imple construction.
The de~ice of the pre~ent invention for heating a container, in particular a laboratory ~ontainer, accompli~hes the above ob~ect with the characteri~tic features of claim 1. Accordingly, in the initially described device, the heating elæment i8 attaahed with its end ~orming the opening for the container to a retainer or holding ring. The retainer ring has at least a slightly la~ger diameter than the rece~s o~ the molded ~o~
Furthermore, a~ a result of lo~alizing the retainer ring on the upper edge region of the molded body, the heatin~
element extends into the reces~ suoh that, as it heats up, it i~ able to expand adeguately toward the wall and bottom o~ the molded body.
In acaordanoe ~ith th~ invention it ha#
lni~ially b~en r~cogniz~d that ths heating ~men~ cah be install~d in the de~ic~ for an ex~hang~ With simp~e te~hnical mean~, ln that the heating element i8 ~eaured with its end forming the opening ~or ths cont~iner to a retainer ring. This xetainer ring ~erves to ~eaure ~hs hGating e~ament at the upper edge of the molded ~ody, it being neces~ary that the retainer ring have at least a $ ~ ~
~lightly larger dia~eter than the recess o~ the ~olded body. Furthermore~ it ha~ b~en ~e~ogni~ed that the arrangement of a retainer ring or the mounting of the hea~ element by means of the retainer ring i~ al~o of advantage ~ith respect to the thermal expansion of the heating element occurring during the heatihg, when ~ a result of localizing the ~etainer ring ~n the upper edge region of the molded body, i.e., a~ter its install~tion, the ~eating ele~ent extends into the rece~ ~uch that, as it heat~ up, it is allowed to expand adequately toward ~he wal~ and ~ot~m of the molded body. In other words, in the ~unheated" condition of the device, it is necessary to ~pace the heating element from the uall and the lower bottom of ~he molded body such that no compressive stres~es cau~ed by the ~olded ~ody occur at maximal thermal expansion.
. The exchangeability of the heating element, in particular ~rom the viewpoints of economy and costs, i~
~urther favored, in ~ha~ the heating element itself is not provided with a c05tly netting ~or the protection or po~itioninq o~' the containe~ to ~e heated. However, in . order to provide the re~eptacle or laboratory container .3 which normally consists of gl~ss, to a aertain degree with l a fir~ support within the tubular heating element, and i moreover to prote~t it against damage resulting from the hard sur~ace o~ the heating elewen~, advantageousl~ the latter i~ loosely covered with a cloth which overliQ~ the : upper edge region ~ the molded body, and i~ simple to ~emove wh~n the h~atlng elem~nt i~ en out.
, Furthexmore, the molted body is surround~d by R ca~ing whlch extends ~ith lts rim at lea~t ln part over the upper edge region, thereby clamping the cloth, in the a6sembled condition, between the upper edge ~eglon o~ the molded '. body and/or the retainer ring and the ca6ing rim. This mea~Ure has accomplished that the heating element is ;l ~
;' :
2~7.~0 4 :
cus~ioned to a certain degxee relative to the container to ~e warmed or heated, and that, contraxy to the previously customary ne~ting or the ll~e, this cushioning can ~e e~ortle~s removed, when exc~anging the heating element or for purposes o~ replacing a soiled cloth. :.
Arranged in further advantageous manner in the region between the casing ~i~ and the upper edge region of the molded body or the cloth aovering same is a seal or pacXing, on the one hand for purpose~ of securing the ~;
aloth in force-locking engage~ent, and on the other han~ :
for preventing ~luid from penetrating from, ~or example, a bursted container between the aasing and the molded body.
Thie paoking ~eals the region ~etween ~he ca~ing rim and the edge region of the molded body as adequately as i~
~u~t possible with a f~bric or cloth extending therebe~ween.
In a fu~her advantageous manner, the seal is provided as a gasket which co~nprise~ a thicker inner ring portlon and a thinner oU~er ring portion. In its in~tallQd oondition, the thinner outer ring portion i~
~ranged on the edge ~egion or the cloth below the casing rim, and the thicker ihner ring portion on the edge ~egion or cloth outside the casing rim, i.e. toward the recess.
This con8tru~tional measure ~urther ~avors the sealing bQtween the casing and the molded body.
With ~espect to the material, the cloth covering the ~eating element consistB o~ a temperature-resistant material, pre~era~ly a gla8~ ~abric. The previou81y mentioned ~eal ~r packing is m~de o~ XUbb~, in particul~r : :
siliaon. ~h~ casing should nd~ahtageou~ly cons~ st o~ a pre~o~ably acid-resistat~t pla~tic.
With respect to the con~tru~tional configuration o~ the ca~ing it i~ of fur~her advantage, ~hen the ca~ing con6i~t~ on the one hand of an upper portion ana on the oth~r hahd o~ a lower portion detachable ~rom the upper portion of the casing. In the assembled condition of the device, the upper portiQn o~ the ca~in~ is slipped ~rom the top onto the mold~d body, ~o that likewise in the asse~led condition the lower portion o~ ~he ca~ng is bolted t~ and/or eng~ged ~rom the bottom with the upper portion of the casing~ The power supply coul~ in this instance extend through the molded ~ody and through the lower portion of the aasing to the outside of the device.
An ON~OFF switch as well a~ the button actuator of a C~cuit brea~er or the like could be arranged on the upper portion o~ the casing.
~ ith r~speot to special ~inds of applications e~ploying hazardous o~ especially aaustic fluids and with respe~t to the exchangeab~lity of the heating element it will be further advantageou~, when for purposes of safely ~eceiving the container, a cup is provided which can be in~erted i~to the re~ess or into the spac~ formed ~y the heating element, and which i3 adapted substantially to the shape o~ the con~ainer. ~his cup will then be placed on the aloth covering the heating element, and is thereby largely secured against tipping. Hazardous ~ubstances whiCh may exit from the container or outflow therefrom at a brsakage of the container, will be caught by the cup, 50 as to exclude a ~oiling or even destruction of the aloth on the one hana and of the heAting element on the other.
As regards caustic substances the cup could be made o$ a high grad~ ~tee~.
Finall~, within the 5COp~ 0~ a ~uxthRr ombodi~nt~ it is po~sible to aon~t~t th~ mold~d body o~
th~ d~vio~ in aaoordanco w~th ~he invantion also in two parts. In this in3tanae, the ~ub portion forming the reaess an~ la~gely a~apted to the shape of the aontainer could be ~upported by an i~dependent oupport portion prefQra~ly construated in ring ~hape. Last not least for pUrpOS~5 0~ ~avlng material, the tub pnrtion could be :
2:~Q78~ ~
; 6 provided with an ou~er wall substantially par~ l to the recess or inner wall, it being only nece~a~y to ensure t~at the wall ~hicXne~s o~ the tu~ po~tion i5 dimensioned such t~at a laboratory container i~ held adeguately and safely. This configuration of the molded body a~lows to reduce in any event consider~bly the ~aterial necess~ry ~or it8 manufacture, thereby decreasing t~e manufacturing costs altogether.
Various possibilitie~ exist to advantageously con~igure and fu~ther develop the teaching oP the present invention. To this end, re~erence may he made on the one hand to the clai~s dependent from claim 1, and on the other hand to the following description of two embodiments o~ the invention wit~ ~eference to the drawing~ In conjunction with the description o~ the preferred embodiment of the invention with reference to the drawing, also generally preerred e~bodiments and ~urther j develop~ent~ of the teaohing are descxibed. In the drawing:
Figure 1 is a ~che~atic, perspect~ve view o~ an embodiment of a dev~ce in accordance with the invention for heating a ~ontainer with an inserted container;
Figure 2 is a schematic ViQW, cut and enlarged, of the embodi~ent of Fig~re 1:
Figure 3 shows a heating ele~ent o~ the embodi~ent o~ Figur~ 1 constructed as a tubular heating elementt ~ igur 4 i~ a ~chQmati~ ~ectione~ ~ie~ o~ tho molded body oP the embodlm-nt o~ ~lgur0 1; and Fig~e ~ is ~ ~ohemat~c, ~o~tloned view o~ a bip~tite molded body ~ second embodi~ent o~ a deviae in accordance with the invention ~or heating a contain~r.
Shown in Flgure 1 iB a schematic ~iew o~ a d~vic- ~or heating a l~boratory container 1. ~hi~ device oompr~--s, ~ ~ho~n in Pigure a, a molded ~ody 2, ~hloh ~
again provided with a recess 3 ~or re~ei~ing the lab~ratory container 1. For heating a heati~g ele~ent ~
i~ used which is c~n.~tructed as a tubular heating element and adapted -~ub~tantially to the ~hape of labora~ory container 1.
Shown in both ~igure 2 and Figure 3 is that heating ele~ent 4 iæ spirally arranged in recess 3 of molded body 2.
In accordance ~ith the invention, the heatin~
element ~ is atta~hed with its end 5 forming the opening for laboratory ¢ontainer 1 to a retainer ~ing S which is bQst seen in Figure 2. This retainer ring 6 ha~ at least a ~light~y larger diameter than recess 3 o~ molded boqy Z.
As can be noted by way of indication in Figure 2, the localizing of retainer ring ~ on the upper edge region 7 o~ molded body 2 permits the heating element ~ to extend into re~e~s 3 such that, as it heats up, it is allowed to exp~nd ~dequa~ely to~ard the wall and bottom o~ ~olded body 2.
Further #hown by wa~ ~ indi~ation in Figures 1 and 2 i8 that the heating element ~ is loosely covered with ~ cloth 8 overlying the upper edge region 7 of molded body 2. Furthermore, the ~olded body ~ is sur~ounded by a casing 10 which extends with a ri~ 9 at least in part over the upper ed~- r~glon 7, the cloth 8 being clamped ~etween .
the upper edge r~gion 7 of molded body 2 or retainer ring 6 and rim 9 o~ t~e ca~i~g.
As can ~urther be no~d ~rom Figu~e~ 1 and 2, a ~eal ~ ar~anged b~tween ca~ing ri~ ~ and upper edge r-gion 7 ~ mo~aed bo~ 2 or cloth 8 extending the~eover.
A3 i~ ~urthe~ ~hown in Figure 2, the ~eAl 11 ~5 mad~ as a ga~ket with a thi~ker ihner ring portion 12 and a thinner outer ring portion 13, the latter being arranged on the ~dg~ region 7 below casing rim 9 and the thicker ihner ~ng portion extending outside casing rim 9 toward receQs 8 ~1~7~
3. With ~espect ~o the materia~s used for the ~anu~acture of the individual components and ~ith respect to the conRtructional configuration of ca~in~ lo reference may be m~de ~o the general description.
Finally ~hown in Figure 5 i~ a furthe~
embodi~ent of the device in ac¢ordanoe with the invention, in which the molded body 2 is con~tructed in ~wo parts. A
tub portion 1~ fo~ming recess 3 is supported in a prefe~ably ring~shaped support portion 15. ~he tub portion 14 comprises an outer wall 17 ~ubstantially p~ral~el to ~ece6s 3 or inne~ wall 16, the wall thickness of tub portion 1~ being dime~sioned suoh that a laboratory container 1 is held ~de~uately and safely.
In conclusion, it ~hould be noted that ~he gist o~ the present in~ention in accordance with claim 1 is by n~ means limited to the ~oregoing e~bodi~ent. ~or example, it is quite possible to conceive a device of the p~esent in~ention also without the casing, it being in this instance necessar~ that the molded body ~ave a co~responding ~trength ~nd possibly a coating. For example, in this instance it would be possible to secure the clo~h in po~ition by an 8djusting ring or the like, w~ich could in thi~ instance ~e placed on the upper edge region of the ~olded body.
Finally ~hown in Figure 5 i~ a furthe~
embodi~ent of the device in ac¢ordanoe with the invention, in which the molded body 2 is con~tructed in ~wo parts. A
tub portion 1~ fo~ming recess 3 is supported in a prefe~ably ring~shaped support portion 15. ~he tub portion 14 comprises an outer wall 17 ~ubstantially p~ral~el to ~ece6s 3 or inne~ wall 16, the wall thickness of tub portion 1~ being dime~sioned suoh that a laboratory container 1 is held ~de~uately and safely.
In conclusion, it ~hould be noted that ~he gist o~ the present in~ention in accordance with claim 1 is by n~ means limited to the ~oregoing e~bodi~ent. ~or example, it is quite possible to conceive a device of the p~esent in~ention also without the casing, it being in this instance necessar~ that the molded body ~ave a co~responding ~trength ~nd possibly a coating. For example, in this instance it would be possible to secure the clo~h in po~ition by an 8djusting ring or the like, w~ich could in thi~ instance ~e placed on the upper edge region of the ~olded body.
Claims (11)
1. Device for heating a container, in particular for heating a laboratory container (1), with a molded body (2) having a recess (3) for receiving the container and an electric heating element (4) preferably constructed as a tubular heating element and adapted substantially to the shape of the container, the heating element (4) being arranged in the recess (3) preferably in spiral shape, characterized in that the molded body (2) is provided in its upper edge region (7) With a groove (18), that the retainer ring (6) is localized in the groove (18) of the molded body (2), and that the heating element (4) is spaced apart from the molded body (2) or does not rest against the molded body (2), so that, as it heats up, the heating element (4) is allowed to expand adequately toward the wall and bottom of the molded body (2).
2. Device as in claim 1, characterized in that the heating element (4) is loosely covered with a cloth (8) overlying the upper edge region (7) of the molded body (2), and that the molded body (2) is surrounded by a casing (10) extending with its rim (9) at least in part over the upper edge portion (7), the cloth (8) being clamped between the upper edge region (7) of the molded body (2) and/or retainer ring (6) and the casing rim (9).
3. Device as in claim 2, characterized in that a seal (11) is arranged between the casing rim (9) and the upper edge region (7) of the molded body (2) or the cloth (8) extending thereover.
4. Device as in claim 3, characterized in that the seal (11) is made as a gasket with a thicker inner ring portion (12) and a thinner outer ring portion (13), the thinner ]outer ring portion (13) being arranged on the edge region (7) or cloth (8) below the casing rim (9) and the thicker inner ring portion (12) on the edge region (7) or cloth (8) outside the casing rim (9) toward the recess (3).
5. Device as in one of claims 2-4, characterized in that the cloth (8) is made of a temperature-resistant glass fabric.
6. Device as in one of claims 3-5, characterized in that the seal (11) is made of silicon.
7. Device is in one of claims 2-6 characterized in that the casing (10) consists of an upper portion and a lower portion, and that the upper portion of the casing is slipped from the top onto the molded body (2), and the lower portion of the casing is bolted to and/or engaged from the bottom with the upper portion of the casing.
8. Device as in one of claims 2-7, characterized in that the casing (10) is made of plastic.
9. Device as in one of claims 1-8, characterized in that for receiving the container a cup is provided which can be inserted into the recess (3) or into the space formed by the heating element, and which is adapted substantially to the shape of the containaer.
10. Device as in claim 9, characterized in that the cup is made of high grade steel.
11. Device is in one of claims 1-10, characterized in that the molded body (2) is made in two parts, a tub portion (14) forming the recess (3) being supported by a preferably ring-shaped support portion (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914111775 DE4111775C2 (en) | 1991-04-11 | 1991-04-11 | Device for heating a container |
| DEP4111775.1 | 1991-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2107890A1 true CA2107890A1 (en) | 1992-10-12 |
Family
ID=6429326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2107890 Abandoned CA2107890A1 (en) | 1991-04-11 | 1992-04-13 | Device for heating a container |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0579690A1 (en) |
| JP (1) | JPH0729060B2 (en) |
| CA (1) | CA2107890A1 (en) |
| DE (1) | DE4111775C2 (en) |
| WO (1) | WO1992018247A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202014007322U1 (en) * | 2014-09-08 | 2015-12-09 | Innovative ThermoAnalytic Instruments KG | Heating hood device with a novel arrangement of the heater |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1565933C3 (en) * | 1966-11-11 | 1973-12-06 | Heraeus-Wittmann Gmbh, 6450 Hanau | Radiators, in particular flexible radiators |
| DE3006679C2 (en) * | 1980-02-22 | 1982-04-22 | Witeg-Glasgeräte Helmut Antlinger KG, 6980 Wertheim | Device for electrical heating of round-bottom flasks made of glass or the like. |
| GB8404549D0 (en) * | 1984-02-21 | 1984-03-28 | Electrothermal Eng Ltd | Electric heating apparatus |
| AU546986B3 (en) * | 1985-04-15 | 1985-11-05 | Ivan Stevens | Improvements in a supporting replacement electric heating element unit |
| DE8713700U1 (en) * | 1987-10-13 | 1987-12-10 | Horst Laborgeraete Gmbh, 6154 Lindenfels, De | |
| DE3813042C1 (en) * | 1988-04-19 | 1989-07-06 | Heraeus-Wittmann Gmbh, 6450 Hanau, De | Electrical heating mantle (jacket) |
| DE9108598U1 (en) * | 1991-07-12 | 1991-11-07 | Winkler, Klaus, 6900 Heidelberg, De |
-
1991
- 1991-04-11 DE DE19914111775 patent/DE4111775C2/en not_active Expired - Fee Related
-
1992
- 1992-04-13 JP JP4507942A patent/JPH0729060B2/en not_active Expired - Lifetime
- 1992-04-13 EP EP19920908522 patent/EP0579690A1/en not_active Ceased
- 1992-04-13 CA CA 2107890 patent/CA2107890A1/en not_active Abandoned
- 1992-04-13 WO PCT/DE1992/000301 patent/WO1992018247A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06500954A (en) | 1994-01-27 |
| DE4111775A1 (en) | 1992-10-22 |
| EP0579690A1 (en) | 1994-01-26 |
| DE4111775C2 (en) | 1993-10-14 |
| WO1992018247A1 (en) | 1992-10-29 |
| JPH0729060B2 (en) | 1995-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |