Method for thermal recording
AssigneeAgfa-Gevaert
InventorsHans Strijckers, Karsten Dierksen, Robert Overmeer, Patrick Van den Bergen
Life of this patent
Estimating the term…
Abstract
A method for recording an image on a thermographic material (m) provides a thermographic material, a transparent thermal head (TH) having energizable heating elements (Hi), and a radiation beam (L). The heating elements of the thermal head are activated and the radiation beam is passed through transparent parts of the thermal head. Herein, the total energy resulting from the thermal head and from the radiation beam has a level corresponding to a gradation of the image to be recorded. Further embodiments comprise e.g. holding the thermographic material on one and a same drum during both an imagewise exposing step and a heating step.
Claims10
A method for recording an image on a thermographic material (m) comprising the steps of
- providing a thermographic material having a thermal imaging element (Ie), a transparent thermal head (TH) having energisable heating elements (Hi), and a radiation beam (L),
- activating heating elements of said thermal head and imagewise and scanwise exposing said imaging element by means of said radiation beam, such that the total energy resulting from said thermal head and from said radiation beam has a level corresponding to a gradation of the image to be recorded on said imaging element, wherein said imagewise and scanwise exposing is carried out by passing said radiation beam through transparent parts of said thermal head.
A method for recording an image on a thermographic material (m) comprising the steps of
- providing a thermographic material comprising the thermal imaging element (Ie), a transparent thermal head (TH) having energisable heating elements (Hi), and a radiation beam (L),
- activating heating elements such that a preheat temperature (T0) in the imaging element is reached which is below the conversion temperature (Tc) of the imaging element,
- imagewise and scanwise exposing said imaging element by means of said radiation beam having a level of energy corresponding to a gradation of the image to be recorded on said imaging element,
- heating said thermal imaging element by a heating means (HM) such that a temperature (Tm) in the imaging element is reached which is higher than the conversion temperature (Tc) of the imaging element and which is apt for developing said thermographic material, wherein said imagewise and scanwise exposing is carried out by passing said radiation beam through transparent parts of said thermal head.
A method for recording an image on a thermographic material (m) comprising the steps of
- providing a thermographic material comprising a thermal imaging element (Ie), at least two thermal heads (TH1, TH2) having energisable heating elements (Hi), and a radiation beam (L),
- imagewise and scanwise exposing said imaging element by means of said radiation beam having a level of energy corresponding to a gradation of the image to be recorded on said imaging element,
- activating during a first heating time (t1) heating elements of one of said thermal heads such that a first temperature (Tm1) in the imaging element is reached,
- activating during a second heating time (t2) heating elements of the other one of said thermal heads such that a second temperature (Tm2) in the imaging element is reached,
- wherein said imagewise and scanwise exposing is carried out by passing said radiation beam through transparent parts of one of said thermal heads.
Dependencies are inferred from the claim text.