--- a/src/iconolab/management/commands/importimages.py	Wed Aug 01 19:05:31 2018 +0200
+++ b/src/iconolab/management/commands/importimages.py	Wed Aug 01 22:21:40 2018 +0200
@@ -18,10 +18,13 @@
     def handle(self, *args, **options):
         raise NotImplementedError
 
+    def get_valid_filename(self, natural_key):
+        return text.get_valid_filename(natural_key.replace('|', '__'))
+
     def get_image_dir(self, natural_key, collection):
         return os.path.join(
             collection.name,
-            text.get_valid_filename(natural_key.replace('|', '__'))
+            self.get_valid_filename(natural_key)
         )
 
     ##
@@ -62,7 +65,10 @@
             image_file_name_fill = int(math.log10(len(image_files)))+1
             for i, image in enumerate(image_files):
                 (_, ext) = os.path.splitext(image)
-                dest_image_name = "{0}_{1:0{2}d}.jpg".format(natural_key, i+1, image_file_name_fill)
+                dest_image_name = "{0}_{1:0{2}d}.jpg".format(
+                    self.get_valid_filename(natural_key),
+                    i+1,
+                    image_file_name_fill)
                 image_path = os.path.join(target_item_image_dir, dest_image_name)
                 if options.get('no-jpg-conversion') or ext in settings.NO_IMG_CONVERSION_EXTS:
                     print('##### Copying file %s to %s without converting'%(str(image), image_path))