diff --git a/pdfminer/converter.py b/pdfminer/converter.py
index 8fd7acf..4a64dbe 100644
--- a/pdfminer/converter.py
+++ b/pdfminer/converter.py
@@ -343,61 +343,3 @@ class XMLConverter(PDFConverter):
     def close(self):
         self.outfp.write('</pages>\n')
         return
-
-
-##  TagExtractor
-##
-class TagExtractor(PDFDevice):
-
-    def __init__(self, rsrcmgr, outfp, codec='utf-8'):
-        PDFDevice.__init__(self, rsrcmgr)
-        self.outfp = outfp
-        self.codec = codec
-        self.pageno = 0
-        self.tag = None
-        return
-
-    def render_string(self, textstate, seq):
-        font = textstate.font
-        text = ''
-        for obj in seq:
-            if not isinstance(obj, str): continue
-            chars = font.decode(obj)
-            for cid in chars:
-                try:
-                    char = font.to_unichr(cid)
-                    text += char
-                except PDFUnicodeNotDefined:
-                    pass
-        self.outfp.write(enc(text, self.codec))
-        return
-
-    def begin_page(self, page, ctm):
-        self.outfp.write('<page id="%s" bbox="%s" rotate="%d">' %
-                         (self.pageno, bbox2str(page.mediabox), page.rotate))
-        return
-
-    def end_page(self, page):
-        self.outfp.write('</page>\n')
-        self.pageno += 1
-        return
-
-    def begin_tag(self, tag, props=None):
-        s = ''
-        if props:
-            s = ''.join( ' %s="%s"' % (enc(k), enc(str(v))) for (k,v)
-                         in sorted(props.iteritems()) )
-        self.outfp.write('<%s%s>' % (enc(tag.name), s))
-        self.tag = tag
-        return
-
-    def end_tag(self):
-        assert self.tag
-        self.outfp.write('</%s>' % enc(self.tag.name))
-        self.tag = None
-        return
-
-    def do_tag(self, tag, props=None):
-        self.begin_tag(tag, props)
-        self.tag = None
-        return
diff --git a/pdfminer/pdfdevice.py b/pdfminer/pdfdevice.py
index b0b39aa..a0fd371 100644
--- a/pdfminer/pdfdevice.py
+++ b/pdfminer/pdfdevice.py
@@ -115,3 +115,61 @@ class PDFTextDevice(PDFDevice):
 
     def render_char(self, matrix, font, fontsize, scaling, cid):
         return 0
+
+
+##  TagExtractor
+##
+class TagExtractor(PDFDevice):
+
+    def __init__(self, rsrcmgr, outfp, codec='utf-8'):
+        PDFDevice.__init__(self, rsrcmgr)
+        self.outfp = outfp
+        self.codec = codec
+        self.pageno = 0
+        self.tag = None
+        return
+
+    def render_string(self, textstate, seq):
+        font = textstate.font
+        text = ''
+        for obj in seq:
+            if not isinstance(obj, str): continue
+            chars = font.decode(obj)
+            for cid in chars:
+                try:
+                    char = font.to_unichr(cid)
+                    text += char
+                except PDFUnicodeNotDefined:
+                    pass
+        self.outfp.write(enc(text, self.codec))
+        return
+
+    def begin_page(self, page, ctm):
+        self.outfp.write('<page id="%s" bbox="%s" rotate="%d">' %
+                         (self.pageno, bbox2str(page.mediabox), page.rotate))
+        return
+
+    def end_page(self, page):
+        self.outfp.write('</page>\n')
+        self.pageno += 1
+        return
+
+    def begin_tag(self, tag, props=None):
+        s = ''
+        if props:
+            s = ''.join( ' %s="%s"' % (enc(k), enc(str(v))) for (k,v)
+                         in sorted(props.iteritems()) )
+        self.outfp.write('<%s%s>' % (enc(tag.name), s))
+        self.tag = tag
+        return
+
+    def end_tag(self):
+        assert self.tag
+        self.outfp.write('</%s>' % enc(self.tag.name))
+        self.tag = None
+        return
+
+    def do_tag(self, tag, props=None):
+        self.begin_tag(tag, props)
+        self.tag = None
+        return